Fight Breaks Out On Plane After Passenger Refuses To Wear A Face Mask

Violence broke out on an Allegiant flight, waiting to take off from Mesa-Phoenix to Provo, UT, because a passenger was wearing a face shield instead of a mask.

About 30 seconds of the incident was shared in a video posted to Instagram by another passenger. It shows what appears to be an airline worker twisting the man's arm as he pulls the older man from his seat. A passenger in the row behind is seen with his arm around the man's neck. A passenger in the row ahead can be seen throwing punches - his face mask pulled below his nose.

It started with argument between the man in the face shield and an airline attendant. An NBC News report isn't clear about who threw the first punch, but only the man with the face shield was forced off the plane.

Allegiant Air policy allows face shields, but still requires a mask be worn with them.