Justin Bieber's friend rapper Lil Za has been arrested by the police from his house for narcotics possession.

Lt. David Thompson has revealed that cocaine was in plain view when Los Angeles law enforcement executed a felony search warrant at the 'Baby' singer's Calabasas mansion, Fox News reported.

Thompson added that the team, comprising of 12 detectives in about eight patrol cars, did not know what they would encounter at the home.

The team was investigating the egg-throwing incident which took place last week that caused damage to a neighbor's home and obtained a felony search warrant regarding the same.