A school boy killed two fellow students and two teachers and wounded nine others in a shooting at a Georgia high school on Wednesday, jolting the United States with the first mass campus shooting since the start of the school year.

The suspect, who had been interviewed by law enforcement last year over online threats about committing a school shooting, was taken into custody shortly after the shooting at Apalachee High School in Winder, Georgia.

Barrow County Sheriff Jud Smith said the gunman, armed with an "AR platform style weapon," or semiautomatic rifle, was quickly confronted by deputies assigned to the school and that the suspect immediately got on the ground and surrendered.

bd-pratidin/GR