A Georgia high school teacher is under investigation after he was filmed telling a student he "might" shoot the kid in the head.

Paul Hagan, a white physics teacher at Rockdale Career Academy, was filmed ranting against an unidentified black student, according to Atlanta's WSB-TV.

"Don't smile at me, man," Hagan is heard telling the student. "That's how people like you get shot."

In the video, which WSB shared on Facebook, Hagan goes on to say, "I gotta bet by the time you're 21 somebody's gonna put a bullet right through your head. OK? And it might be me the one who does it."

The video was apparently shot by another student.

Officials at Rockdale Career Academy are investigating the incident. It's unclear if Hagan will face disciplinary action.

Clint Davis is a reporter for the Scripps National Desk. Follow him on Twitter @MrClintDavis. Keep up to date with the latest news by following @ScrippsNational on Twitter.