The man broke the window’s inner pane and plastic frame before being subdued on a Frontier Airlines flight on Tuesday. The F.B.I. is investigating.

Police said chaos erupted about 20 minutes into the flight from Denver to Houston when the man began punching the seat in front of him and the plane window.

Twenty minutes into the flight from Denver to Houston, witnesses say the man was punching the seat in front of him.

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A Frontier Airlines passenger was restrained on the airline's Flight 4856 from Denver to Houston after he was screaming and punching the aircraft's windows on Tuesday, Feb. 4.

An unruly passenger on a Frontier Airlines flight was seen on video yelling and being taken down by fellow passengers.