The Macon-Bibb County fire chief says one firefighter will lose his job for his role in a firehouse prank video that showed a masked man threatening firefighters.

Chief Marvin Riggins says one sergeant will be demoted to private and four firefighters will be suspended for 10 days without pay.

The Telegraph reports Riggins says five of the seven firefighters pictured were in on the prank, and two rookies were not.

The video, titled "Rookie prank," shows a masked man bursting into a fire station and threatening firefighters. It was posted Sunday on YouTube.

The video shows firefighters face-down on the ground as a man with a yellow bandana over his face waves a gun.

At one point, the gunman leads a firefighter away and a gunshot is heard.

Tags: fire, Macon-Bibb County, firefighter, Marvin Riggins, prank