Rapper Snoop Dogg's real name is Calvin Broadus

Officials began an inquiry after Dogg's caravan was stopped after the Black Entertainment Television Awards in Los Angeles in June last year.

Police arrested three heavily-armed bodyguards and confiscated knives, ammunition and handguns.

A spokesman for the corrections department in Los Angeles did not release the officers' names.

He said three parole agents were part of the entourage and a fourth officer was found to be working for Dogg while on a disability leave.

The spokesman declined to give the reason why they were fired, saying they expected them to appeal against the decision within 30 days.

He said employment was forbidden by state regulations if it was "incompatible or inconsistent" with their duties.

Last year a school district board voted to fire eight part-time school police officers including four who moonlighted as bodyguards for Snoop Dogg, when an unknown gunman shot at his convoy in April 2003.