(CNN) — Two students and two teachers at Apalachee High School were killed in a shooting Wednesday morning at the school, officials said Wednesday afternoon. Nine others were injured.
Watch: Apalachee High School shooter was a 14-year-old student, officials say
The gunman who opened fire in the Winder, Ga. school is believed to be a 14-year-old boy, a law enforcement source told CNN.
The source said it is not yet known whether the teen attended that school.
The suspect is alive and in custody, the Georgia Bureau of Investigation said in a post on X.
Four people were killed in the shooting, according to the GBI. Nine others were transported to hospitals with injuries.
Law enforcement sources said earlier approximately 30 people were injured in the shooting. It was unclear how many of those injuries are from gunshot wounds; the information is preliminary and subject to change.
Watch: Aerial footage show scene outside Apalachee High School following reported shooting
Video from outside the school showed at least five ambulances and a large law enforcement presence at the campus, and at least one medical helicopter could be seen airlifting a patient from the scene. Footage also showed people gathering on a football field near the school as students appeared to pray.
All schools in the Barrow County School System, which includes the high school, were placed on lockdown and police were sent out of an abundance of caution to all district high schools, according to the sources, but there are no reports of secondary incidents or scenes.
Some of the critically injured were removed by helicopter, and additional helicopters are on standby.
Barrow County Sheriff Jud Smith, in a brief news conference at the scene, said authorities received the call about an active shooter around 9:30 a.m. He would not share the number of casualties, saying only there were “multiple injuries,” but he confirmed one suspect was in custody.
Smith asked for patience, saying the investigation remains “very, very fluid.” He hopes to provide another update around 4 p.m. ET, he said.
Watch: Aerial footage shows victim carried off in stretcher
Grady Health System – a Level 1 trauma center in Atlanta, about an hour from Winder – received one gunshot wound victim from the incident who was transported by helicopter, a hospital spokesperson told CNN.
A source with knowledge of the situation, who is not authorized to speak to the media, told CNN that Piedmont Athens Regional Hospital in North Georgia received two victims from the shooting. The source said one victim is an adult with a gunshot wound to the stomach currently in surgery and that another is a minor with unspecified injuries.
The Barrow County School System told CNN students have been cleared to leave and parents have been notified to pick them up. Transportation will be provided to students who need it, the district said.
Georgia Gov. Brian Kemp has directed all available state resources to assist at the scene, he said in a statement on social media. The governor urged “all Georgians to join my family in praying for the safety of those in our classrooms, both in Barrow County and across the state.”
President Joe Biden has been briefed on the incident, the White House said, offering federal support to state and local officials.
“His administration will continue coordinating with federal, state, and local officials as we receive more information,” the White House said in a statement.
Watch: Grady Hospital in Atlanta treating school shooting victim
Attorney General Merrick Garland similarly said the US Department of Justice “stands ready” to support the community after the shooting.
“We are still gathering information, but the FBI and ATF are on the scene, working with state, local and federal partners,” Garland said at a meeting of the Justice Department’s Election Threats Task Force.
“I am devastated for the families that have been affected by this terrible tragedy,” Garland added. “The Justice Department stands ready to provide any resources or support that the Winder community needs in the days ahead.”
Winder had a population of about 18,338 as of the 2020 census, according to the US Census Bureau. The Barrow County School System is the 24th largest school district in the state, per the district’s website. It serves about 15,340 students, 1,932 of whom are enrolled at Apalachee High School.
This is a developing story and will be updated.