Justin Bieber in punch-up outside hotel

By Lee Han-soo

Pop star Justin Bieber was involved in a street brawl outside a hotel in Cleveland, Ohio, on Wednesday, according to TMZ, a U.S. celebrity news website.

TMZ revealed footage of Bieber and a much bigger man fighting outside a hotel.

The footage begins with Bieber and the man arguing.

As Bieber grabs the man’s collar, the man fights back and slaps Bieber on the forehead. Bieber responds with a right fist to the man’s face.

Bieber is known to have been in Cleveland to watch the NBA finals between Cleveland Cavaliers and Golden State Warriors.

There is speculation the fight erupted over an autograph.

“Yo, check. The fool ran up on me. I was with the girls - we just asked for an autograph,” Lamont Richard, who claims he is the man in the video, told TMZ. But the claim has not been verified.