Pop star Justin Bieber has found himself in trouble with Los Angeles police. He apparently was involved in some type of altercation with a paparazzi photographer over the weekend in Calabasas, California and is now wanted for questioning by Los Angeles County Sheriff investigators.

According to TMZ:

Justin was in Calabasas, where he lives, just after noon Sunday at a mall called The Commons. A paparazzo attempted to take Justin’s picture and, according to law enforcement, some sort of physical altercation erupted between Justin and the camera guy.

The photog called 911, and when cops arrived Justin and GF Selena Gomez had already split.

The photog complained of pain to his upper torso, an ambulance was summoned and he was taken to a local hospital where he was examined and released a short time later.

The photog filed a police report naming Justin as the culprit. Cops are investigating the incident as a misdemeanor battery.

Law enforcement tells us detectives want to speak with Justin, Selena and any other witnesses.

We placed a call to Justin’s rep … so far, no comment.

Witnesses say the photographer was blocking Justin’s van as he was trying to leave, which led to the confrontation.