Justin Bieber is working with police after his house raid.

The singer was accused of throwing over 20 eggs at a neighbour’s house, and police subsequently raided his Calabasas, California property on Tuesday to investigate.

Despite the discovery of drugs in his home, Justin is apparently doing what he can to work with the police.

"Justin is of course cooperating with the authorities," a source told E! News. "He"s also moving forward and concentrating on work and his new music."

The 19-year-old was reportedly asleep when police arrived at his house to investigate.

As a result of the raid, Justin’s friend Lil Za was arrested on suspicion of drug possession after MDMA and Xanax were found on the premises.

Lil Za was re-arrested in prison for vandalism after he smashed a telephone, and has since been released on $70,000 bail. Narcotics investigators are said to be looking into the matter.

According to E!, surveillance footage was taken from Justin’s house in order to see if the singer was involved in the egg-throwing incident. If it is proven he was indeed guilty of vandalising his neighbour’s property, the teenager could be charged with a felony.

"The houses in that neighbourhood are of a quality that any damage is going to be extensive. So they had some imported wood and brick and that was significantly damaged," Lt. Steve Whitmore said.