(CNN) Three package bombs that exploded in Austin, Texas, over 10 days -- killing a teenager and a 39-year-old man and critically injuring an elderly woman -- appear to be connected, police said Monday.

Here's what we know so far:

• Two of the explosions happened within hours of each other Monday, sending police scrambling from one crime scene to the next. The first blast happened March 2.

• The bombs killed a 39-year-old African-American man on March 2, killed a 17-year-old African-American male early Monday morning, and severely injured a 75-year-old Hispanic woman midday Monday. A woman hurt in the Monday morning explosion had non-life threatening injuries, police said.

• The residents found the packages outside their houses, but none was delivered by the Postal Service or delivery services like UPS or FedEx, police said.

• Police also have not decided if these are hate crimes, but said that's a possibility because of the victims' races.

• "The evidence makes us believe these incidents are related," Austin Police Chief Brian Manley said.

Authorities in Austin investigate a package explosion Monday that left one person dead and another injured.

The packages were placed in front of the residents' houses, the chief said.

In describing the blast that killed the teenager, Manley said: "One of the residents went out front and there was a package on the front doorstep. They brought that package inside the residence and as they opened that package, both victims were in the kitchen, and the package exploded, causing the injuries that resulted in the young man's death and the injuries to the adult female."

Neighbors described house-rattling experiences.

"It shook my house and it shook my body," Isaiah Guerrero told CNN affiliate KXAN of the explosion that injured the elderly woman. Guerrero said he climbed onto his roof, where he could see police walking up to one of his neighbors' homes. "From that angle, you could actually see the house that got the package sent to them."

Anna Marie Castillo said she lives five houses from that blast site. She was at work but quickly contacted her parents, who told her they saw the victim in the yard covered in glass and covering her face with her hands.

Castillo's parents said they carried blankets to her because the explosion ripped off some of her clothing, she said.

"It's really scary and hits really close to home," Castillo said. "I'm worried to look in the mailbox."

Chief urges caution

All residents of Austin should be careful about packages, Manley said. Investigators have not discovered a motive, and he did not say if anybody has claimed responsibility. It's not known if the victims knew each other or if they were targeted, he said.

"If you've received a package that has been left on your doorstep or left in your yard or left on your driveway that you were not expecting or that was not from someone you know, then give us a call," Manley said.

.@chief_manley advising everyone in Austin to be cautious if they receive a package 📦 and weren't expecting one. If you see something suspicious please dial 9-1-1 so we can send officers out to assist you. #safety #austinpd #atx pic.twitter.com/hA7Tv0bT0E — Austin Police Dept (@Austin_Police) March 12, 2018

Residents seemed to be listening. By 6 p.m. Monday, the police had received 82 calls about suspicious packages, police spokeswoman Stephanie Jacksis told KXAN.

Austin resident Trey Mathis said he expected a package to be delivered Monday but was still nervous when it showed up.

"The odds seemed very favorable, so I took a walking stick and from behind my door, I cautiously tumbled the box over to bring up the label, where I could verify it was addressed to me and from the expected shipper," Mathis said. "I resolved to post the picture onto social media ( Instagram , then to Twitter and Facebook) to alert the USPS, if possible."

Likewise, Manley urged the thousands of visitors in town -- many at the South by Southwest Conference and Festivals -- to be cautious.

"Enjoy yourself, have a good time," he said. "But be aware, be suspicious."

SXSW began Friday in downtown Austin, bringing in thousands of people to the state capital. The explosions were not in the immediate vicinity of the festival and authorities say the bombings don't appear connected to the festival.

"Safety is and always has been a top priority for SXSW," a festival spokesperson said. "We continue to work with law enforcement and our venues to address the safety of SXSW attendees. At this time the Austin Police Department does not believe that the incidents are connected to the event. The substantial security operation already in place for SXSW has been instructed to be extra vigilant."

Teen 'a very happy young man'

Anthony Stephan House

Authorities have identified one victim, Anthony Stephan House, 39, who died from injuries in the March 2 explosion. The woman injured Monday afternoon suffered life-threatening injuries, Manley said.

CNN is not naming the 17-year-old victim because he has not been identified yet by authorities, but an Austin Community College professor who taught him last year said he had a bright future.

"He was smart. He was in high school and taking college classes," US government professor Samuel Osemene said. "He was a young guy with so much future and potential. We talked a lot about college. He hugged me every morning before class."

Osemene said that he would always remember the young man's smile.

"He was a very happy young man with so much energy. He was loving and always had a smile on his face. He made friends easily and will be missed," he said.

The March 2 blast that killed House was reported about 6:55 a.m. in the 1000 block of Haverford Drive. It was first regarded as an isolated incident, but police now classify it as a homicide.

The first Monday blast was reported at 6:44 a.m. in the 4000 block of Oldfort Drive and the second Monday blast was around noon in the 6700 block of Galindo Street.

Police were processing the scene at the first Monday explosion when the second occurred.

'Powerful devices'

Manley said the packages are "average sized delivery boxes, not exceptionally large" that the residents found outside their houses.

"These are very powerful devices," he said, declining to be specific. "There's a certain level of skill required to move a device like this."

Texas Attorney General Ken Paxton urged all Texans to be cautious. "With three reported explosions in the Austin area, I want to urge all Texans to report any suspicious or unexpected packages arriving by mail to local law enforcement authorities. Call 911 immediately if you receive something suspicious," he said on Twitter.

With three reported explosions in the Austin area, I want to urge all Texans to report any suspicious or unexpected packages arriving by mail to local law enforcement authorities. Call 9-1-1 immediately if you receive something suspicious. — Ken Paxton (@KenPaxtonTX) March 12, 2018

Local police, as well as agencies including the FBI and the Bureau of Alcohol, Tobacco, Firearms and Explosives, are working on the case.

The ATF is processing evidence from the first device at its lab and evidence from the second device will also be sent to an ATF lab for consistency.

Gov. Greg Abbott announced a $15,000 reward for information leading to the identification and arrest of the person or persons involved in the package blasts.

Austin Mayor Steve Adler, speaking Monday at a news conference, said, "This is still a safe city."

"We don't know yet why this is happening or what the motivation is," he said. "Just as soon as we know things and things we can report to the community, I'm going to make sure the community hears it right away."

Correction: A previous headline for this story on the CNN app incorrectly stated that the explosive packages were connected to the South By Southwest Festival, currently taking place in Austin. The police have not said there is a connection. The CNN app headline has been corrected.</s>AUSTIN — A pair of package explosions that left two people dead in Austin, Texas, over the past 10 days share similarities and authorities suspect they are connected, police said.

The latest incident occurred Monday morning; the other on March 2. In both instances, a resident retrieved a package that blew up when it was opened.

Both packages were not delivered via any mail services and both homes are those of African Americans. A 17-year-old boy died Monday and a woman was transported with non-life-threatening injuries. Another male died from his injuries in the March 2 explosion.

“This type of crime will not be tolerated” in Austin, Police Chief Brian Manley said.

Both cases are now being investigated as homicides, Manley said during a news conference Monday.

Police were responding to another “reported explosion” Monday afternoon, but have not yet said whether it is connected to this investigation. Manley strongly urged residents in a tweet to be on the lookout for suspicious packages and to alert authorities immediately.

“If you’ve received a package that has been left on your doorstep or left in your yard or left on your driveway that you were not expecting or that was not from someone you know, then give us a call,” Manley said.

Local police, as well as agencies including the FBI, and the Bureau of Alcohol, Tobacco, Firearms and Explosives, are working on the case.</s>A third explosion in which a package exploded at a residence appears to be connected to two other explosions in Austin, Texas, city Police Chief Brian Manley said Monday at a news conference. A 75-year-old woman was critically injured Monday and a 17-year-old male was injured in an earlier Monday blast. A March 2 blast killed a 39-year-old man.

A pair of package explosions that left two people dead in Austin, Texas, over the past 10 days share similarities and authorities said they suspect they’re connected.

The latest incident occurred Monday morning; the other on the morning of March 2. In both instances, a resident retrieved a package that blew up when it was opened.

Both packages were not delivered via any mail services and both homes are those of African-Americans.

A 17-year-old boy died Monday and a woman was transported with non-life-threatening injuries. Anthony Stephan House, 39, died from injuries in the March 2 explosion, police said.

Authorities are looking into whether the incidents could be hate crimes, but as of now there is no evidence the victims were targeted because of their race, Austin Police Chief Brian Manley said.

“Both of the homes that were the recipients of these packages belong to African-Americans,” the chief said at a news conference. “So we cannot rule out that hate crime is at the core of this. But we’re not saying that’s the cause as well.”

Both cases are now being investigated as homicides, Manley said.

Police were responding to another “reported explosion” Monday afternoon, but have not yet said whether it is connected to this investigation. In a tweet, Manley strongly urged residents to be on the lookout for suspicious packages and to alert authorities immediately.

“If you’ve received a package that has been left on your doorstep or left in your yard or left on your driveway that you were not expecting or that was not from someone you know, then give us a call,” Manley said.

Texas Attorney General Ken Paxton urged all Texans to be cautious. “With three reported explosions in the Austin area, I want to urge all Texans to report any suspicious or unexpected packages arriving by mail to local law enforcement authorities. Call 911 immediately if you receive something suspicious,” he said on Twitter.

Local police, as well as agencies including the FBI, and the Bureau of Alcohol, Tobacco, Firearms and Explosives, are working on the case.

The ATF is processing evidence from the first device at its lab and evidence from the second device will also be sent to an ATF lab for consistency.

The annual South by Southwest Interactive Festival began Friday in downtown Austin and ends Tuesday. The explosions are not in the immediate vicinity of the festival.</s>AUSTIN, Texas — A pair of package explosions that left two people dead in Austin, Texas, over the past 10 days share similarities and authorities suspect they are connected, police said.

The latest incident occurred Monday morning; the other on March 2. In both instances, a resident retrieved a package that blew up when it was opened.

Both packages were not delivered via any mail services and both homes are those of African Americans. A 17-year-old boy died Monday and a woman was transported with non-life-threatening injuries. Another male died from his injuries in the March 2 explosion.

Authorities are looking into whether the incidents could be hate crimes, but as of now there is no evidence the victims were targeted because of their race, says the official.

“This type of crime will not be tolerated” in Austin, Police Chief Brian Manley said.

Both cases are now being investigated as homicides, Manley said during a news conference Monday.

Police were responding to another “reported explosion” Monday afternoon, but have not yet said whether it is connected to this investigation. Manley strongly urged residents in a tweet to be on the lookout for suspicious packages and to alert authorities immediately.

“If you’ve received a package that has been left on your doorstep or left in your yard or left on your driveway that you were not expecting or that was not from someone you know, then give us a call,” Manley said.

Local police, as well as agencies including the FBI, and the Bureau of Alcohol, Tobacco, Firearms and Explosives, are working on the case.

The ATF is currently processing evidence from the first device at their lab and evidence from the second device will also be sent to ATF lab for consistency.

Authorities have not conclusively linked the first and second device.

The annual South by Southwest Interactive Festival began Friday in downtown Austin and ends Tuesday. The explosions are not in the immediate vicinity of the festival.</s>AUSTIN – Three explosions that occurred when people picked up packages outside their residences appear to be connected, Austin, Texas, city Police Chief Brian Manley said Monday at a news conference.

A Monday morning explosion killed a 17-year-old African-American boy and also injured a woman at the house. A second Monday explosion left a 75-year-old woman in critical condition, the chief said. A March 2 blast killed a 39-year-old African-American man.

All the explosions occurred when people who lived at the residences went outside and picked up packages, Manley said. The packages were not delivered by the postal service or delivery services like UPS or FedEx, he said.

“The evidence makes us believe these incidents are related,” he said, saying investigators have not come up with a motive, and he did not say if anybody has claimed responsibility. It’s not known if the victims knew each other or if they were targeted, he said.

Police also have not decided if these are hate crimes, but he said that’s a possibility because of the victims’ races.

“We’re not ruling anything out at this point,” he said. “We’re willing to investigate any avenue.”

Authorities have identified one victim. Anthony Stephan House, 39, died from injuries in the March 2 explosion, police said. The woman injured Monday afternoon suffered life-threatening injuries, the chief said.

In describing the Monday morning blast that killed the teenager, the chief said: “What we understand at this point is that early this morning is that one of the residents went out front and there was a package on the front doorstep. They brought that package inside the residence and as they opened that package, both victims were in the kitchen, and the package exploded, causing the injuries that resulted in the young man’s death and the injuries to the adult female.”

That woman’s injuries were not life-threatening, he said.

Manley strongly urged residents to be on the lookout for suspicious packages and to alert authorities immediately.

“If you’ve received a package that has been left on your doorstep or left in your yard or left on your driveway that you were not expecting or that was not from someone you know, then give us a call,” Manley said.

Likewise, he urged the thousands of visitors in town — many at the South by Southwest Interactive Festival — to be cautious. “Enjoy yourself, have a good time,” he said. “But be aware, be suspicious.”

The festival began Friday in downtown Austin and ends Tuesday. The explosions were not in the immediate vicinity of the festival.

Texas Attorney General Ken Paxton urged all Texans to be cautious. “With three reported explosions in the Austin area, I want to urge all Texans to report any suspicious or unexpected packages arriving by mail to local law enforcement authorities. Call 911 immediately if you receive something suspicious,” he said on Twitter.

Local police, as well as agencies including the FBI, and the Bureau of Alcohol, Tobacco, Firearms and Explosives, are working on the case.

The ATF is processing evidence from the first device at its lab and evidence from the second device will also be sent to an ATF lab for consistency.

Gov. Greg Abbott announced a $15,000 reward for information leading to the identification and arrest of the person or persons involved in the package blasts.</s>A series of package bombs have rocked Austin, Texas in the last two weeks, and now Austin's governor is asking for help getting information about the disturbing incidents, which police now warn may be connected.

Three Packages Have Exploded Across The City, Leaving Two Dead

On Monday, a 75-year-old woman was seriously injured after picking up a package that was left outside her home. Police Chief Brian Manley said "she was significantly injured[.]"

Hours earlier, a similar package killed a 17-year-old boy and seriously injured another woman.

On March 2nd, a 39-year-old man, Anthony Stephan House, was killed in a similar incident.

Neighbors told Dallas News reporter Jackie Wang that "the earth shook" and people "were running and screaming, holding babies and pets.

All The Victims Have Been People Of Color

Police Chief Manley told reporters that two of the previous victims were African American and that the latest victim was Hispanic, leaving open the possibility that the incidents were racially motivated.

At Least Two Of The Packages Are Believed To Have Been Hand Delivered

Manley says that at least two of the packages are believed to have been delivered by hand, without the use of any major courier or mailing service.

Authorities Say They Suspect The Incidents Are Connected

Manley told reporters that evidence points to a connection between the incidents, and Texas Attorney General Ken Paxton has urged Austin residents to beware of unexpected packages and call 911 if they suspect something suspicious.

Authorities are offering up to $15,000 for information that leads to an arrest. Anyone with information has been encouraged to call Crime Stoppers at 1-800-252-8477, text "DPS" and a tip to 274637 or submit a tip online.

The FBI and the Burau of Alcohol, Tobacco, Firearms and Explosives are investigating the crimes along with the Austin Police Department.</s>In the midst of the city’s annual South By Southwest festival, Austin, Texas has been rocked by a series of deadly and seemingly connected package explosions. Two separate blasts were reported in the area around East Austin on Monday morning, with the first killing a 17-year-old boy and injuring a woman, and the second injuring another woman and possibly a second individual, according to investigators on the scene. Along with a first explosion on March 2nd, which killed a man just north of Austin, CNN reports the authorities are now trying to determine whether or not all three incidents are connected.

According to CBS Austin, early Monday morning a resident in East Austin found a package outside the house and brought it inside. When the resident, a 17-year-old African-American male, opened the package in the kitchen, it exploded — killing him and injuring a woman. The third blast occurred just south of the river a few hours later, injuring another woman a package delivered to the location was opened. Per CNN, Austin Police have determined that the targeted properties are all owned by African-Americans, and they’re therefore trying to determine whether these are a hate crimes.

Just before news of the third package explosion made the rounds, Austin Police Chief Brian Manley told reporters near the scene of the second blast that it and the March 2nd incident were being investigated as connected events. “That case was being investigated as a suspicious death,” he said. “It is now being reclassified and is now a homicide investigation as well. We are looking at these incidents as being related based on similarities that we have seen in the initial evidence that we have on hand here today compared to what we found on the scene of that explosion that took place a week back.”

None of the packages were delivered to their respective locations via any known mail services. As a result, Austin Police are asking that anyone in the city who finds anything “delivered” to their doorstep not by USPS, FedEx, UPS, or any other major mail carrier report it immediately to the authorities.</s>A third explosion in which a package exploded at a residence appears to be connected to two other explosions in Austin, Texas, city Police Chief Brian Manley said Monday at a news conference. A 75-year-old woman was critically injured Monday and a 17-year-old male was injured in an earlier Monday blast. A March 2 blast killed a 39-year-old man.

Both packages were not delivered via any mail services and both homes are those of African Americans. A 17-year-old boy died Monday and a woman was transported with non-life-threatening injuries. Another male died from his injuries in the March 2 explosion.

Authorities are looking into whether the incidents could be hate crimes, but as of now there is no evidence the victims were targeted because of their race, says the official.

“This type of crime will not be tolerated” in Austin, Police Chief Brian Manley said.

Both cases are now being investigated as homicides, Manley said during a news conference Monday.

Police were responding to another “reported explosion” Monday afternoon, but have not yet said whether it is connected to this investigation. Manley strongly urged residents in a tweet to be on the lookout for suspicious packages and to alert authorities immediately.

“If you’ve received a package that has been left on your doorstep or left in your yard or left on your driveway that you were not expecting or that was not from someone you know, then give us a call,” Manley said.

Local police, as well as agencies including the FBI, and the Bureau of Alcohol, Tobacco, Firearms and Explosives, are working on the case.

The ATF is currently processing evidence from the first device at their lab and evidence from the second device will also be sent to ATF lab for consistency.

Authorities have not conclusively linked the first and second device.

The annual South by Southwest Interactive Festival began Friday in downtown Austin and ends Tuesday. The explosions are not in the immediate vicinity of the festival.</s>Louisville had ample opportunities to make the NCAA Tournament, but the Cards gave their bid away by losing winnable games to Seton Hall, Clemson, Miami and Virginia.

Louisville had ample opportunities to make the NCAA Tournament, but the Cards gave their bid away by losing winnable games to Seton Hall, Clemson, Miami and Virginia.

The victim was seriously hurt in the incident, but there's no word on their current condition.

The victim was seriously hurt in the incident, but there's no word on their current condition.

The Indiana Gaming Commission could discuss the fee issue in May or June.

The Indiana Gaming Commission could discuss the fee issue in May or June.

Kerry Porter has long maintained his innocence in the 1996 murder of a truck driver, arguing that Louisville police officers purposely concealed and fabricated evidence while ignoring more likely suspects.

Kerry Porter has long maintained his innocence in the 1996 murder of a truck driver, arguing that Louisville police officers purposely concealed and fabricated evidence while ignoring more likely suspects.

Officials say officers found marijuana, a digital scale and a loaded handgun during a search of the room.

Officials say officers found marijuana, a digital scale and a loaded handgun during a search of the room.

The woman said she'd been partying for the last few days.

The woman said she'd been partying for the last few days.

Eric Crawford turns his attention to the basketball coaching situation at the University of Louisville.

Eric Crawford turns his attention to the basketball coaching situation at the University of Louisville.

(CNN) -- A pair of package explosions that left two people dead in Austin, Texas, over the past 10 days share similarities and authorities suspect they are connected, police said.

The latest incident occurred Monday morning; the other on March 2. In both instances, a resident retrieved a package that blew up when it was opened.

Both packages were not delivered via any mail services and both homes are those of African Americans. A 17-year-old boy died Monday and a woman was transported with non-life-threatening injuries. Another male died from his injuries in the March 2 explosion.

"This type of crime will not be tolerated" in Austin, Police Chief Brian Manley said.

Both cases are now being investigated as homicides, Manley said during a news conference Monday.

Police were responding to another "reported explosion" Monday afternoon, but have not yet said whether it is connected to this investigation. Manley strongly urged residents in a tweet to be on the lookout for suspicious packages and to alert authorities immediately.

"If you've received a package that has been left on your doorstep or left in your yard or left on your driveway that you were not expecting or that was not from someone you know, then give us a call," Manley said.

Local police, as well as agencies including the FBI, and the Bureau of Alcohol, Tobacco, Firearms and Explosives, are working on the case.</s>AUSTIN, Texas (AP) — The Latest on deadly package bombings in Austin, Texas (all times local):

Authorities say a package that exploded inside of an Austin home, killing a teenager and wounding a woman, is linked to a deadly package sent to another home in Texas’ capital city earlier this month because they were both left on the front doorstep and not delivered by a mail service.

Austin police Chief Brian Manley said at a news conference Monday that the U.S. Postal Service does not have a record of delivering a package to the Austin home where the explosion occurred Monday.

He says that package was brought into the kitchen where it detonated, killing a 17-year-old boy and injuring the woman.

The FBI is helping Austin police in the investigation.

A teenager has died and a woman is seriously injured after a package exploded at a home in Austin, marking the second such explosion this month at a home in Texas’ capital city.

The package detonated early Monday. Police say the teen died at the scene, while the woman was taken to a hospital with life-threatening injuries. Police say the woman is in her 40s, but they haven’t released any other information.

Authorities are investigating whether the explosion is linked to a similar blast on March 2 that killed a 39-year-old man. Both explosions occurred in the early-morning hours.

Police are investigating that incident as a suspicious death. Investigators haven’t released information about the device or possible suspects.

The FBI is helping Austin police in the investigation.
Police in Austin, Texas announce that three package bombs in recent days that have killed two people and injured one more appear to be connected. The packages were left off at three separate locations and were not placed there by any delivery service, police say.