(CNN) A 17-year-old male student shot two other students at Great Mills High School in Maryland on Tuesday morning before a school resource officer engaged him and stopped the threat, authorities said.

The incident began in a school hallway at 7:55 a.m., just before classes started. Authorities say Austin Wyatt Rollins, armed with a handgun, shot a female and a male student. The shooter had a prior relationship with the female student, St. Mary's County Sheriff Tim Cameron said.

School resource officer Blaine Gaskill responded to the scene in less than a minute, the sheriff said. Gaskill fired a round at the shooter, and the shooter fired a round simultaneously, Cameron said.

Rollins was later pronounced dead. Gaskill was unharmed. The 16-year-old female student is in critical condition with life-threatening injuries, and the 14-year-old male student who was shot is in stable condition.

Cameron said he was not sure whether Gaskill's bullet hit the suspect, but he praised the officer's quick response to the situation.

Read More</s>On Tuesday morning, authorities in St. Mary’s county in Maryland confirmed an incident had occurred at Great Mills High School. CNN followed up with the above breaking news alert (of a reported shooting), and the school went on lockdown with CBS Baltimore reporting that the situation was quickly contained. Parents were directed to pick their students up at a nearby school. Notably, this situation arrives after recent shooting threats against Great Mills High, which is sadly the case for countless schools after the Parkland, Florida massacre.

Local police, sheriff’s deputies, and the FBI have quickly arrived on the scene, and the school district tweeted that a shooting had occurred.

Authorities have now confirmed that at least three people were injured, possibly including the shooter. No fatalities have been reported at this time.

Police will brief the public soon, but in the meantime, CNN spoke with a student named Jonathan Freese, who relayed his reactions from inside a classroom to the unfolding incident. As Freese indicated, he was very “shaken up” but felt safe because two officers are always on the scene at his school. Freese, who did not hear gunfire, also relayed unconfirmed word (hearsay) that many people were shot, although that information has since been corrected.

Here’s Freese’s full interview with CNN. We’ll update this situation as further details unfold.</s>GREAT MILLS, Md. -- A teenager wounded a girl and a boy inside his Maryland high school Tuesday before an armed school resource officer was able to intervene, and each of them fired one more round as the shooter was fatally wounded, a sheriff said.

St. Mary's County Sheriff Tim Cameron said the student with the handgun was declared dead at a hospital, and the other two students were in critical condition. He said the officer was not harmed.

Cameron said authorities were still investigating whether the shooter was killed by the officer.

"When the shooting took place, our school resource officer, who was stationed inside the school, was alerted to the event and the shots being fired. He pursued the shooter and engaged the shooter, during which that engagement he fired a round at the shooter," Cameron said.

"Simultaneously the shooter fired a round as well. So, in the hours to come, in the days to come, through a detailed investigation, we will be able to determine if our SRO's round struck the shooter."

This latest shooting comes as lawmakers nationwide are under pressure to take action against gun violence following the Valentine's Day killings of 17 people at a Florida high school by a teenager with an assault weapon. Maryland's Senate joined the House Monday night to ban bump stocks, which enable a semi-automatic rifle to mimic a fully automatic weapon.

Outside the school, a line of about 20 school buses formed on the street in front of the building. Ambulances, fire trucks and other emergency vehicles crowded the parking lot and the street. No students or parents could be seen outside at midmorning.

The St. Mary's County Public Schools said the situation was "contained" after the shooting at Great Mills High School, which has about 1,600 students and is near the Patuxent River Naval Air Station, about 65 miles (104 kilometres) southeast of Washington.

Agents with the FBI and the Bureau of Alcohol, Tobacco, Firearms and Explosives joined deputies at the scene. The county sheriff said parents or guardians should stay away, urging them to go instead to Leonardtown High School to reunite with Great Mills students there.

Many students across the country are calling for effective gun controls, leading up to Saturday's March For Our Lives rally in the nation's capital against gun violence in schools. Threats against schools have proliferated as well, and Great Mills High has not been immune.

Just last month, the school's principal, Jake Heibel, told parents in a letter posted on the local news site The Bay Net that two students were interviewed after they were overheard mentioning a school shooting, and they were found to pose no threat. Heibel said the school increased its security nevertheless after social media posts about a possible school shooting "circulated quite extensively."

Also last month, St. Mary's County Sheriff's office said it arrested two teenage boys for "Threats of Mass Violence" and a 39-year-old man on related charges after the teens made threats about a potential school shooting at Leonardtown High School, a high school about 10 miles from Great Mills. Police said they obtained a search warrant that led to them finding semi-automatic rifles, handguns and other weapons, along with ammunition.</s>MARYLAND — Great Mills High School in Great Mills, Maryland, is on lockdown after a shooting at the school, St. Mary’s County Public Schools said on its website.

“The Sheriff’s office is on the scene; additional information to follow,” the school district said Tuesday, adding that the incident has been contained.

A spokesman for the FBI’s Baltimore field office said its agents are on the scene of an incident in Great Mills, Maryland.

Special agents from the ATF’s Baltimore office are en route to the reported shooting, that office tweeted.

Jonathan Freese, a student at Great Mills, told CNN he was in lockdown in his math class. Police are going through classrooms to clear the school, and students will then be escorted out of the school, Freese said.

“I’m still a little shaken up,” he said.

According to CNN’s research, there have been 16 confirmed school shootings this year in the United States prior to today.</s>Great Mills High School in Maryland was on lockdown after a shooting on Tuesday morning, school officials confirmed.

The incident was contained and the St. Mary’s Sheriff’s Office was on the scene, the school said on its website. Maryland State Police also told Fox News they were responding to the incident. Agents from the Bureau of Alcohol, Tobacco and Firearms were also heading to the scene.

The Sheriff’s Office warned parents to not “respond to the school” but instead go to Leonardtown High School, where students will be transported.

NBC Washington reported multiple injuries, but that was not immediately confirmed by authorities.

Special agents from the Bureau of Alcohol, Tobacco, Firearms and Explosives [ATF] are traveling to the school to investigate the incident.

Maryland Gov. Larry Hogan tweeted Tuesday that his office is “closely monitoring the situation at Great Mills High School.”

“Maryland State Police is in touch with local law enforcement and ready to provide support. Our prayers are with students, school personnel, and first responders,” Hogan wrote.

The school is located about 60 miles from Washington, D.C.

The incident comes more than a month after the school shooting at Marjory Stoneman Douglas High School in Parkland, Fla. That massacre, carried out by a former student, left 17 people dead. The shooting also comes days before some 500,000 people were expected to march Saturday in Washington, D.C. to protest gun violence and honor those killed in the Parkland massacre.</s>GREAT MILLS, Md. — A teenager wounded a girl and a boy inside his Maryland high school Tuesday before an armed school resource officer was able to intervene, and each of them fired one more round as the shooter was fatally wounded, a sheriff said.

St. Mary’s County Sheriff Tim Cameron said the student with the handgun was declared dead at a hospital, and the other two students were in critical condition. He said the officer was not harmed.

Cameron said authorities were still investigating whether the shooter was killed by the officer.

“When the shooting took place, our school resource officer, who was stationed inside the school, was alerted to the event and the shots being fired. He pursued the shooter and engaged the shooter, during which that engagement he fired a round at the shooter,” Cameron said.

“Simultaneously the shooter fired a round as well. So, in the hours to come, in the days to come, through a detailed investigation, we will be able to determine if our SRO’s round struck the shooter.”

This latest shooting comes as lawmakers nationwide are under pressure to take action against gun violence following the Valentine’s Day killings of 17 people at a Florida high school by a teenager with an assault weapon. Maryland’s Senate joined the House Monday night to ban bump stocks, which enable a semi-automatic rifle to mimic a fully automatic weapon.

Outside the school, a line of about 20 school buses formed on the street in front of the building. Ambulances, fire trucks and other emergency vehicles crowded the parking lot and the street. No students or parents could be seen outside at midmorning.

The St. Mary’s County Public Schools said the situation was “contained” after the shooting at Great Mills High School, which has about 1,600 students and is near the Patuxent River Naval Air Station, about 65 miles (104 kilometers) southeast of Washington.

Agents with the FBI and the Bureau of Alcohol, Tobacco, Firearms and Explosives joined deputies at the scene. The county sheriff said parents or guardians should stay away, urging them to go instead to Leonardtown High School to reunite with Great Mills students there.

Many students across the country are calling for effective gun controls, leading up to Saturday’s March For Our Lives rally in the nation’s capital against gun violence in schools. Threats against schools have proliferated as well, and Great Mills High has not been immune.

Just last month, the school’s principal, Jake Heibel, told parents in a letter posted on the local news site The Bay Net that two students were interviewed after they were overheard mentioning a school shooting, and they were found to pose no threat. Heibel said the school increased its security nevertheless after social media posts about a possible school shooting “circulated quite extensively.”

Also last month, St. Mary’s County Sheriff’s office said it arrested two teenage boys for “Threats of Mass Violence” and a 39-year-old man on related charges after the teens made threats about a potential school shooting at Leonardtown High School, a high school about 10 miles from Great Mills. Police said they obtained a search warrant that led to them finding semi-automatic rifles, handguns and other weapons, along with ammunition.

on was “contained” as deputies and federal agents converged on the crime scene.

St. Mary’s County Sheriff spokeswoman Cpl. Julie Yingling said three people hurt, including the shooter. She didn’t know the extent of their injuries, but said all three were taken to hospitals and none were killed.

The Baltimore Sun reported that a student said the shooting happened around 8 a.m. Terrence Rhames, 18, told the Sun that he heard a gunshot and saw a girl fall as he ran for an exit. “I just thank god I’m safe,” Rhames said. “I just want to know who did it and who got injured.”

The St. Mary’s County Public Schools said the situation was “contained” after the shooting at Great Mills High School, which has about 1,600 students and is near the Patuxent River Naval Air Station, about 65 miles (104 kilometers) southeast of Washington.

Agents with the FBI and the Bureau of Alcohol, Tobacco, Firearms and Explosives joined deputies at the scene. The county sheriff said parents or guardians should stay away, urging them to go instead to Leonardtown High School to reunite with Great Mills students there.

Maryland Gov. Larry Hogan and Rep. Steny Hoyer tweeted that they’re monitoring reports and urged people to follow the instructions of local law enforcement at the scene.

This latest shooting happened as many students are calling for action against gun violence in schools, leading up to Saturday’s March For Our Lives rally in the nation’s capital. Protests have been spreading around the nation since a teenager with an assault rifle killed 17 people at a Florida high school on Valentine’s Day. Threats against schools have proliferated as well.

Last month, the St. Mary’s County Sheriff’s office said it arrested two teenage boys for “Threats of Mass Violence” and a 39-year-old man on related charges after the teens made threats about a potential school shooting at nearby Leonardtown High. Police said they obtained search warrants and found a cache of semi-automatic rifles, handguns and other weapons.

This is a developing story. Check back for details.</s>Deputies and federal agents at Great Mills High School in Maryland. AP
• Police responded to reports of a shooting at Great Mills High School in Maryland just as classes were getting underway early Tuesday.
• The shooter is dead and two students are in critical condition, law-enforcement officials said.
• An armed resource officer on duty at the school engaged the shooter.
• Great Mills is in St. Mary's County, Maryland, about 65 miles southeast of Washington, DC.

Two students were injured at Great Mills High School in Maryland on Tuesday morning in a shooting that was interrupted by an armed resource officer there, law-enforcement officials said.

The gunman, a student, is dead, St. Mary's County Sheriff Tim Cameron said.

Reports say the shooter, who has not been identified, fired at a female student in a hallway just as classes were getting underway, as well as at another student.

The resource officer on duty then engaged the shooter. The officer was not injured.

"Our school resource officer who was stationed inside the school was alerted," Cameron said, adding: "He pursued the shooter, engaged the shooter. During that engagement, he fired a round at the shooter. Simultaneously, the shooter fired a round as well."

In an interview with the Washington news station WUSA9, Cameron said the officer "stopped any further assault and attack on any other students."

The shooter and the two students were transported to local hospitals. A 16-year-old female student is in critical condition, while a 14-year-old male student is in critical but stable condition, Cameron said.

Authorities first responded to reports of gunfire at the school around 8 a.m. The St. Mary's County Sheriff's Office, along with state police and special agents from the Bureau of Alcohol, Tobacco, Firearms, and Explosives, also arrived to investigate.

The St. Mary's County Public Schools website said students were being bused from Great Mills to a nearby high school where their parents could pick them up.

A Twitter user named Mollie Davis said she was inside the school during the shooting.

Gov. Larry Hogan said on Twitter that he was "closely monitoring the situation" and that his "prayers are with students, school personnel, and first responders."

Rep. Steny Hoyer, whose congressional district includes Great Mills, also said his "prayers are with the students, parents, and teachers" and urged everyone to obey instructions from local police.

Last month, 17 people were killed in a shooting at Marjory Stoneman Douglas High School in Parkland, Florida, sparking a debate about the regulation of guns in the US.

Many students participated in a nationwide school walkout last week to protest gun violence, and thousands are expected to attend the March for Our Lives in Washington, DC, on Saturday to call for stricter gun regulations.

This is a developing story. Refresh for updates</s>WUSA channel 9 in Maryland is reporting a shooting at Great Mills High School in St Mary’s County in Maryland. The shooting itself is reported to be contained at this time. At this point the news is incomplete, but it is known that students from Great Mills High School are being relocated to nearby Leonardtown High school for the parents to pick their kids up.

Current reports say that at least four people have been taken to local hospitals for injuries. Currently a text message conversation has provided a bit of information. There is a student at the school reporting that “none of the other students are responding” – but as the school is on lockdown it is possible that they are safe, but just told not to use their phones.

According to WUSA, the Maryland State police and the Bureau of Alcohol, Tobacco and Firearms (ATF) said they are helping St. Mary’s County Sheriff’s office in the investigation. The ATF special agents said they cannot provide any information about the suspect as of right now.

We will bring you updates as they are made available. As always, we at The Duran send our prayers and hopes for a safe resolution of this incident.

Buy us a coffee! ☕ Every Dollar, Pound and Euro you send us helps our publication stay active, reach more people and to continue to shed light on the social-political issues of our time. Will you help expose the lies of the mainstream media? As a reader of The Duran, you are well aware of all the propaganda and disinformation reported by the mainstream media. You know how important it is to bring real news to light. Please support The Duran and help us keep reporting on news that is fair, balanced, and real.</s>Police converge on Great Mills High School, the scene of a shooting in Maryland, on March 20, 2018.

Great Mills, Md. (AP) -- The Latest on the shooting at a Maryland high school (all times local):

A sheriff says the school resource officer who shot at the suspect during a shooting at a Maryland high school is unhurt.

Speaking at a news conference, St. Mary's County Tim Cameron says the male student was armed with a handgun Tuesday morning when he wounded a female student and a male student just before classes began at Great Mills High School in southern Maryland.

Cameron says all three were hospitalized and the shooter was later pronounced dead.

Cameron says the shooter and the school resource officer both fired and it wasn't immediately known if the officer's bullet killed the suspect.

A sheriff says the shooter at a Maryland high school has died after a school resource officer fired at him.

St. Mary's County Tim Cameron told a news conference Tuesday morning that the shooter and the officer both fired a round and it wasn't known if the officer's bullet killed the suspect.

Cameron says a female student and a male student were also wounded in the shooting in a hallway at Great Mills High School in southern Maryland.

The principal at the Maryland high school where there was a shooting Tuesday morning told parents last month that the school had investigated threats of a possible shooting and found they were "not substantiated."

Great Mills High School Principal Jake Heibel told parents that school officials interviewed two students in February who were overheard mentioning a school shooting and found that they posed no threat. His letter was posted on the local news site The Bay Net.

But Heibel said the school still increased its security after social media posts about a possible school shooting "circulated quite extensively."

St. Mary's County Sheriff's spokeswoman Cpl. Julie Yingling says three people, including the shooter, were injured in Tuesday's shooting.

A sheriff's spokeswoman says three people have been injured in a shooting at a high school in southern Maryland, including the shooter.

St. Mary's County Sheriff's spokeswoman Cpl. Julie Yingling says there have been no fatalities in the Tuesday morning shooting at Great Mills High School.

Yingling says the two victims were shot, but she doesn't know how the shooter was injured. She also didn't have the identities of the any of the three injured.

She says all three had been transported to hospitals.

FBI agents are on the scene of a shooting at a high school in southern Maryland.

FBI spokesman David Fitz says the agents are there to assist the local sheriff's office and he had no immediate information about injuries or fatalities at Great Mills High School.

Agents from the federal Bureau of Alcohol, Tobacco, Firearms and Explosives have also been sent to the school.

The county sheriff said deputies are on the scene and that parents or guardians should stay away, going instead to Leonardtown High School to reunite with Great Mills students there.

A sheriff's spokeswoman says injuries have been reported after a shooting at a high school in southern Maryland.

St. Mary's County sheriff's spokeswoman Cpl. Julie Yingling says there are injuries Tuesday at Great Mills High School but she didn't know how many or the severity of the injuries. She also said she had no information about fatalities.

Agents from the federal Bureau of Alcohol, Tobacco, Firearms and Explosives were headed to the scene.

The county sheriff said deputies are on the scene and that parents or guardians should stay away, going instead to Leonardtown High School to reunite with Great Mills students there.

Maryland Gov. Larry Hogan and Rep. Steny Hoyer tweeted that they're monitoring reports and urged people to follow the instructions of local law enforcement at the scene.

School officials report that there's been a shooting at a Maryland high school, that the 'event is contained' and the campus is on lockdown.

Federal agents from the bureau of Alcohol, Tobacco and Firearms are going to the scene, their agency tweeted.

The St. Mary's County Public Schools said on its website early Tuesday that there was a shooting at Great Mills High School, located in the southern end of the state.

The county sheriff said deputies are on the scene, and that parents or guardians should stay away, going instead to Leonardtown High School to reunite with Great Mills students there.

Maryland Gov. Larry Hogan and Rep. Steny Hoyer tweeted that they're monitoring reports and urged people to follow the instructions of local law enforcement at the scene.</s>A 17-year-old gunman fired a Glock 9-millimeter gun at a 14-year-old boy and a 16-year-old girl at 7:55 a.m. in a hallway at Great Mills High School in Southern Maryland on Tuesday.

The alleged shooter died after a confrontation with a school resource officer.

In the fallout of the shooting, many different storylines have developed. Here’s all of them in one place:
• The 14-year-old boy shot in a hallway at Great Mills High School in Southern Maryland minutes before class started Tuesday was discharged from the hospital Wednesday, officials confirmed.
• The 16-year-old victim of Tuesday’s shooting at Great Mills High School — identified by family as Jaelynn Willey — remained in critical condition Wednesday morning, according to a hospital spokesman.
• As school systems across the country debate arming staff, state and local officials praised the actions of the school resource officer who fired at a gunman at Great Mills High School.
• The gun used by the suspected teenage shooter is difficult for adults to buy under Maryland’s tough gun laws.
• Students at Great Mills posted on social media sites Snapchat and Twitter during the deadly shooting. As school shootings become more common, so do social media images depicting them.
• Great Mills High School in St. Mary's County will remain closed for the rest of the week, as the school community deals with the shooting’s aftermath. Schools will be closed next week for spring break, so Great Mills High is expected to reopen April 2.
• The St. Mary’s County students flipped off the lights and put paper over the small windows in the classroom doors. Their teacher was outside. He had run in the direction of the gunfire. With the recent school shooting in Parkland, Fla., in many minds, one 17-year-old junior realized: “This was the real thing.”
• The shooting was not the first instance of school violence in the state. Violent incidents have occurred in and around public schools across Maryland for years, in urban and suburban areas, inside school buildings and outside their walls, involving students and others who targeted them.
• The same day of the shooting, Carroll County Public Schools announced it will place armed law enforcement presence in some schools.
A shooting occurs at Great Mills High School in Great Mills, Maryland. Two students are reported injured; the shooter is killed by police.