Watch the video, below, showing a panicked cast, crew and audience flee the set.
According to reports, the host of the program, Le Grand Journal, came back on air shortly after to say that police had taken the perpetrator into custody and that he had shot two blanks into the air as well as having a fake grenade in his possession.
A witness told The Hollywood Reporter: “I thought I heard them say, ‘Run, he has a gun.'”
No injuries were reported.