SAN FRANCISCO (CBS SF) — A new cellphone video appears to show former boxing champion Mike Tyson unloading a flurry of punches on a passenger seated behind him on a plane at San Francisco International Airport.

The video was posted by TMZ, which said the incident happened at around 10:30 p.m. as the a JetBlue plane was set to fly out of SFO headed for Florida.

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According to TMZ, a witness on the plane said Tyson earlier had taken a selfie a couple of passengers and was patient with one overly-excited passenger who kept trying to talk to Tyson as he sat behind the 55-year-old former heavyweight fighter.

The report cited sources close to Tyson as saying the man was extremely intoxicated and wouldn’t stop provoking the boxer while in his seat.

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The video shows Tyson leaning over the back of his seat and repeatedly punching the passenger in the head. The report also showed photos of a man gesturing toward Tyson in the aisle in front of him and another showing the man with a bloodied forehead.

The report said Tyson walked off the plane shortly after the incident.

The San Francisco Police Department told CBS News that officers detained two people involved in a “physical altercation onboard an airplane” at the San Francisco International Airport Wednesday night. It said one person was treated at the scene for non-life-threatening injuries.

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“That subject provided minimal details of the incident and refused to cooperate further with the police investigation,” SFPD added in the statement. “Both subjects were released under 849(b) of the California Penal Code pending further investigation.”

Source: sanfrancisco.cbslocal.com.