Bieber lays into LA lensman
Teen idol Justin Bieber is wanted for questioning by Los Angeles County Sheriff's investigators after a photographer complained of being roughed up by the pop star at a shopping centre.
Sheriff's Lieutenant Robert Wiard said the photographer called police on Sunday and complained about pain in his chest.
Wiard said the scuffle happened when the photographer tried to take pictures of Bieber and his girlfriend, teen actress Selena Gomez, after they walked out of a theatre.
Wiard said the photographer was taken to a hospital, where he was treated and released. He said Bieber and Gomez left before deputies arrived, so investigators want to get his side of the story.
A call to Bieber's publicist was not immediately returned late on the weekend.
Celebrity website TMZ reported that Bieber was hanging out with former heavyweight boxer Mike Tyson just hours before his run-in with the paparazzi. It reported that he received boxing tips from the controversial former champion .
Tyson later tweeted a picture of the two, saying: "Me, @johnny and @justinbieber before we started training JB."