Casualties were reported in an active shooter situation at Apalachee High School in Winder, Georgia, on Wednesday morning, according to the Barrow County Sheriff's Office.
One suspect is in custody, the sheriff's office said.
The incident is over and a local hospital is "treating multiple gunshot wounds," according to one source briefed on the situation.
Details on the number of victims and their conditions were not immediately clear, the sheriff's office said.
