Justin Bieber's security team are under investigation again following an alleged bust-up with a fan who was trying to take a photograph of the singer.

The unidentified individual has filed a battery report with police, alleging he was assaulted by one of Bieber's bodyguards after trying to take a snap of the Baby hitmaker at a night spot in Los Angeles.

The fan called the cops, who arrived on the scene after Bieber and his entourage had left the venue, and a misdemeanour battery investigation into the incident has been opened. The 19-year-old pop star is not considered a suspect in the case, according to Tmz.com.

This is the latest assault allegation to plague the singer's security team after a paparazzo filed a battery report with police on Wednesday (05Jun13), alleging he was attacked by Bieber's minders while trying to photograph the singer skateboarding in a parking lot in Miami, Florida.

In a similar incident, allegedly on the same day (05Jun13), Bieber was reportedly caught on tape ordering his security guards to confiscate another snapper's camera after objecting to the photographer taking pictures of him leaving a recording studio in Miami.