(CNN) A woman killed three people and wounded three others before fatally shooting herself at a drugstore distribution center Thursday in Harford County, Maryland, officials said. 
 
 A source close to the investigation said the woman was a disgruntled employee. Sheriff Jeffrey Gahler told reporters the woman was a temporary employee and showed up for work at her normal time at the facility near Aberdeen. 
 
 She shot people outside the building and on the warehouse floor, he said. The woman died at a nearby hospital after shooting herself in the head, he said. 
 
 She was identified by the sheriff's office as Snochia Moseley, 26, from Baltimore County. 
 
 Police are still searching for a motive, he added. 
 
 A law enforcement official briefed on the incident said the suspect was at some point a security guard at the Rite Aid support facility where the shooting occurred. 
 
 The suspect used a 9 mm Glock pistol and brought several magazines for the gun, Gahler said at a news conference. The gun was hers and was purchased legally, he said. 
 
 The sheriff wouldn't release any details about the six victims or the shooter, saying that their next of kin were still being notified. 
 
 No law enforcement officers fired shots during their response, he said. Johns Hopkins Bayview Medical Center received four patients with "priority one gunshot wounds," said spokeswoman Kristin Mears. 
 
 At a news conference, Ray Fang, the hospital's trauma medical director, said two of the victims were stable and doing well, while two remain seriously injured. All the victims were out of surgery, he said. 
 
 Fang declined to provide additional information until he was sure all the victims' families had been notified. 
 
 Rite Aid spokeswoman Susan Henderson said roughly 1,000 employees work at the distribution center, where products are received and processed for delivery. 
 
 "The shooting happened adjacent to the primary building," she said. 
 
 Neighbor: 'It's right on the doorstep' 
 
 Colleen Hendrickson, who lives and works in the area, said she was waiting on the bus when someone told her there had been a shooting nearby. 
 
 "I, of course, thought it was far off or, that's like down the road or something, right?" she told CNN affiliate WJZ . "No, it's right outside. It's right on the doorstep." 
 
 She saw emergency vehicles, including ambulances, and helicopters, which were out of place for the "sleepy" part of the county, she said. The area is home to many warehouses and plants, some belonging to major brands, including makeup and bleach companies. 
 
 "It's really just usually very calm, and this is the most chaotic I've ever seen it," she told the station. "It's very scary when it's just right there on your doorstep because you can see a billion news reports about shooters, about emergency instances, and it still doesn't make it real to you." 
 
 People were being asked to avoid the area just outside the city of Perryman, roughly 30 miles northeast of Baltimore. Homes, churches and a cemetery are in the vicinity. Railroad tracks run alongside a business park. 
 
 It's the third high-profile shooting in the US in two days 
 
 Deputies were dispatched at 9:09 a.m. ET, the sheriff said. They were on the scene in five minutes. 
 
 The Bureau of Alcohol, Tobacco, Firearms and Explosives sent agents from Baltimore. The FBI's Baltimore office is also assisting. 
 
 "We are closely monitoring the horrific shooting," Gov. Larry Hogan tweeted. "Our prayers are with all those impacted, including our first responders. The state stands ready to offer any support." 
 
 A shooting at The shooting came a day after two other shootings that made national news.A shooting at an office complex in Middleton, Wisconsin , left three people hurt Wednesday, and a gunman wounded four people at the Masontown Borough Municipal Center in Pennsylvania later in the day. 
 
 Police killed the shooters in both Wednesday incidents. ||||| Officials: Woman Kills 3, Injures 3 Before Taking Her Own Life In Aberdeen Shooting 
 
 A woman shot and killed three people, and wounded three others before taking her own life at a Rite Aid warehouse in Aberdeen on Thursday. 
 
 Harford County Sheriff Jeffrey R. Gahler wasn't ready to identify the 26-year-old in a Thursday afternoon press conference, but said she was a temporary employee whose last known address was in Baltimore County. Authorities do not yet have a motive. 
 
 Authorities later confirmed the 26-year-old woman is Snochia Moseley. Prior to that, the 11 News I-Team's Lisa Robinson reached a woman believed to be related to the suspect via telephone. The woman hung up saying, "I just lost my daughter." 
 
 Moseley has no prior criminal record. Online court records only show a slew of unresolved traffic cases and a civil case related to an unpaid Baltimore County tax bill. 
 
 Investigators believe the shooting began outside Rite Aid's Perryman Distribution Center in the business park at 1501 Perryman Road, then moved inside, Gahler said. The call came into police at around 9:06 a.m., Gahler said. Gahler said deputies are working to establish a timeline of the shooting. 
 
 Multiple sources say this is the vehicle of the suspect in the Rite Aid Distribution Center shooting no license plates and police escort. #wbal pic.twitter.com/FIp60PPCI4 — Lowell Melser (@MelserWBAL) September 20, 2018 
 
 Investigators believe the shooting began outside Rite Aid's Perryman Distribution Center in the business park at 1501 Perryman Road, then moved inside, Gahler said. The call came into police at around 9:06 a.m., Gahler said. Gahler said deputies are working to establish a timeline of the shooting. 
 
 Deputies and other first responders arrived just over five minutes later. Law enforcement officers paired up with medics, rendered first aid and attempted to locate suspects, Gahler said. The shooter was found with a self-inflicted gunshot wound and died at an area hospital. Two victims were pronounced dead at the scene. 
 
 The shooter used a single handgun registered to her and multiple magazines, Gahler said. He didn't say how many shots were fired, but said none were fired by law enforcement. 
 
 Company officials were told about the shooting by someone inside the building. Some 1,000 people work at the facility. 
 
 "We are continuing to work closely with authorities as they conduct their investigation," Rite Aid spokesman Peter Strella said. "The facility has been closed and we are assessing when it will be reopened. Grief counselors will be made available to our associates and will remain available as long as they are needed. Our thoughts and prayers go out to all those involved in this tragic incident, as well as their loved ones.” 
 
 .@wbalradio has confirmed that the shooting happened at the @riteaid facility on Perryman Road in Aberdeen, per a company spokesperson — Phil Yacuboski (@WBALPhil) September 20, 2018 
 
 I’m reporting live on @wbalradio now from the scene of the @riteaid distribution facility where @Harford_Sheriff says multiple people have been shot along Perryman Rd outside of #Aberdeen Listen for team coverage of this #MassShooting pic.twitter.com/rORN9Bew0o — Scott Wykoff (@ScottWykoffWBAL) September 20, 2018 
 
 There is a family reunification center at the Level Fire Company at 3633 Level Village Road in Havre de Grace. 
 
 The Harford County Emergency Operations Center is partially activated due to the situation and the Harford County Information Hotline at 410-838-5800 has been activated for people trying to get in touch with family and loved ones. 
 
 Four gunshot victims were taken by ambulance to Johns Hopkins Bayview Medical Center, trauma director Dr. Raymond Fang said. Some patients needed surgery, Fang said, with two in stable condition as of 2:39 p.m. and two "very seriously injured." 
 
 One other victim is in serious condition at Christiana Hospital in Newark, Delaware. 
 
 County Executive Barry Glassman said Gov. Larry Hogan has offered all available assistance. State troopers and federal agencies were part of the response. Glassman made reference to last year's fatal mass shooting at an Edgewood granite company. 
 
 "Unfortunately, in today's world, we have active shooter drilling and drills, and I can tell our Harford County citizens that every agency performed at the top of their profession," Glassman said. "I am thankful to all the agencies that came out to help us today to get through this, which is becoming too often an occurrence in Harford County and also the country." 
 
 A witness, Bo, who did not want to share his last name, described the scene. 
 
 "We were like two blocks over when we got completely bombarded by -- I'm not exaggerating -- 20-30 cops, and then ambulances and everything started pouring in. At that point, they blocked us in and we tried to turn around," Bo said. "They're telling us that there is an active shooter." 
 
 Alexi Scharmann told WBAL-TV 11 News her mother works inside the Liberty building at the distribution center. She said her mother texted her that there is a shooter inside the building. 
 
 "Everybody there is so tight-knit. There's not that many people that work there. Everybody is so nice over there, that's why it's a shock," Scharmann said. 
 
 While there is security and metal detectors in an adjacent building, Scharmann said the Liberty building where her mother works does not have the same safeguards. 
 
 Scharmann said she heard from her mother in a text at 10:33 a.m., saying "I am outside and safe. I love you." 
 
 Witnesses and survivors are being taken to a community center in Havre de Grace, Scharmann said. 
 
 Bo, who said he lives on Aberdeen Proving Ground, said the area is wooded and has nearby schools. 
 
 "This happened inside the warehouse (on Perryman Road)," Bo said. "They called a bunch of EMS and they told us they were carrying out another five victims." 
 
 Bo said the response from police and paramedics was swift. 
 
 "We didn't know what to do. They were coming in groups of 10. I am not joking, and they were running people off the road. There was even an accident and a head-on collision dead in front of us at a stoplight because they were literally throwing people off the road. They were going," Bo said. 
 
 Church Creek Elementary School is on modified lockdown as a precaution. 
 
 White Marsh Volunteer Fire Company said its paramedics are responding to the incident. 
 
 Zenith Freight Services, Maines Paper and Food Service and TRUaire Registers and Grilles share the large building with Rite Aid. The Clorox Company Warehouse is directly adjacent to the building the Rite Aid is in. 
 
 The Perrywood Garden Apartments complex is across from the Rite Aid past Perryman Road on Spesutia Road. Officers were seen near those apartments along Mayberry Drive. 
 
 Medic leaving area of shooting with multiple victims in business park in Aberdeen. Aberdeen police just told me shooter not apprehended, situation "fluid" pic.twitter.com/8FmRRA7WnE — Jayne Miller (@jemillerwbal) September 20, 2018 
 
 We can confirm there was a shooting in the area of Spesutia Road and Perryman Road. Multiple victims. The situation is still fluid. Please avoid the area. Media staging area still TBD. — Harford Sheriff (@Harford_Sheriff) September 20, 2018 
 
 People are being asked to avoid the area. 
 
 Stay with WBAL NewsRadio 1090 AM for developments in this story. 
 
 We are closely monitoring the horrific shooting in Aberdeen. Our prayers are with all those impacted, including our first responders. The State stands ready to offer any support. https://t.co/fzugpo8C1Z — Governor Larry Hogan (@GovLarryHogan) September 20, 2018 
 
 The Associated Press contributed to this report. ||||| Aberdeen police officers blocks the entrance of industrial complex where several people had been shot, in Harford County, Md, Thursday, Sept. 20, 2018. Authorities say multiple people have been shot in... (Associated Press) 
 
 Aberdeen police officers blocks the entrance of industrial complex where several people had been shot, in Harford County, Md, Thursday, Sept. 20, 2018. Authorities say multiple people have been shot in northeast Maryland in what the FBI is describing as an "active shooter situation." (AP Photo/Jose... (Associated Press) 
 
 ABERDEEN, Md. (AP) — Workers say they endured horrifying moments of wild gunfire and terror as a woman working a temporary job at a drugstore warehouse in Maryland fired on colleagues with a handgun, killing three people before fatally shooting herself. 
 
 The shooting, which authorities said was touched off when the worker got into an argument Thursday morning, sent survivors screaming and running in all directions from the Rite Aid distribution center in northeastern Maryland. Others nearby helped the wounded and one person tied blood-soaked jeans around an injured man's leg trying to staunch the bleeding. 
 
 Worker Walter Zambrano, 64, said he was fortunate that he was in a bathroom when shooting broke out during a 9 a.m. morning break when workers were gathering in a cafeteria. He hid in the bathroom until the shooting stopped, fearing for his life. 
 
 The person was "shooting like crazy, bam! bam! bam!" Zambrano said, speaking in Spanish. "Everyone was screaming, running this way and that. I didn't know which way to run." 
 
 Harford County Sheriff Jeffrey Gahler told a news conference hours later that the woman had been identified as a temporary employee, Snochia Moseley of Baltimore County. It appears only one weapon was used — a 9 mm Glock handgun that was registered in Moseley's name — and no shots were fired by responding law enforcement officers, he added. 
 
 "She had reported for her workday as usual, and around 9 a.m. the shooting began, striking victims both outside the business and inside the facility," Gahler said. 
 
 He called it a "senseless crime," adding investigators didn't have any motive immediately after the shooting. 
 
 Three people were fatally shot and three more were wounded but expected to survive, the sheriff said. The victims were not immediately identified. Moseley died at a hospital from a self-inflicted gunshot wound, according to the sheriff. 
 
 The sheriff said the call about shots fired came in at about 9:06 a.m. Thursday and deputies and other officers were on the scene in just over five minutes. The shooting began outside the business and continued inside, he said. 
 
 Krystal Watson said her husband Eric works at the facility and told her told her the suspect had been arguing with somebody else near a time clock after a "town hall meeting." 
 
 "And she went off," she said. 
 
 "She didn't have a particular target. She was just shooting," Watson said as she left a fire station where relatives sought to be reunited with loved ones. 
 
 Susan Henderson, spokeswoman for the drugstore chain Rite Aid, described the building where the shooting took place as a support facility adjacent to a larger building. The company said in a statement that the facility had been closed temporarily and grief counselors were being made available to workers. 
 
 The company didn't immediately respond to an inquiry about Moseley's employment history. 
 
 Mike Carre, an employee of a furniture logistics operation next to the distribution center, said he helped tend to a wounded man who came hobbling in, bleeding from his leg. He called 911 before helping colleagues wrap the man's blood-soaked jeans above his injury to cut off blood flow. 
 
 Carre said the man told him the shooter "just came in in a bad mood this morning. He said she's usually nice. But today, I guess it wasn't her day. She just came in to pick a fight with someone." 
 
 "She pulled out a gun and she just started shooting at her co-workers." 
 
 The attack came nearly three months after a man with a shotgun attacked a newspaper office in Annapolis, Maryland, killing five staff members. Authorities accused Jarrod W. Ramos of attacking The Capital Gazette because of a longstanding grudge against the paper. It came less than a year after a fatal workplace shooting less than 10 miles (16 kilometers) from the warehouse, in which five were shot, three fatally. 
 
 Harford County Executive Barry Glassman said that, unfortunately, shooting like this are "becoming a too-often occurrence" in the nation. 
 
 On Thursday, 33-year-old Dominique Norton of Aberdeen, endured an excruciating wait of nearly two hours to be reunited with her mother, 62-year-old warehouse worker Irene Norton. The younger woman said she didn't know that her mother was unharmed until she got off a bus at the fire station and they tearfully embraced. 
 
 "I busted out crying. I was relieved and shaken," she said. "I am praying for all of the victims." 
 
 ___ 
 
 Kunzelman reported from Havre de Grace, Maryland. Associated Press writers Eric Tucker in Washington; Bill Cormier in Atlanta; Sarah Rankin in Richmond, Virginia; and Sarah Brumfield in Washington contributed to this report.
– News that a shooting left multiple people dead may sound depressingly familiar, but the one outside Baltimore on Thursday is unique in at least one way: The shooter was female. Police say the 26-year-old woman, who has not been identified, died of a self-inflicted gunshot wound to the head. Harford County Sheriff Jeff Gahler said she was a temporary employee at the Rite Aid distribution center where the shooting took place, reports the Baltimore Sun. Police say the suspect killed three people, and three others remain hospitalized with wounds not believed to be life threatening. Details and developments: When, where: The Rite Aid distribution center where the shooting took place is at a business complex in Perryman, about 30 miles from Baltimore, reports WBAL. Deputies got there at 9:06am, within 5 minutes of the first call, said the sheriff. He said that deputies fired no shots and that the shooter used a 9mm Glock semiautomatic handgun. Why: Police aren't speculating about a motive. “Normally, she was a nice person, but she came in in a bad mood,” Mike Carre, an employee at a nearby business, tells the Washington Post, recounting what Rite Aid workers told him. "She wanted to pick a fight," he said. "And then she started shooting.” CNN quotes a law enforcement official who describes her as a disgruntled employee; the site says she worked there as a security guard. The woman lived in Baltimore County, and the gun was legally registered to her.