Justin Bieber has been accused of battery by a neighbor ... and cops are at the singer's home in Calabasas, CA investigating ... TMZ has learned.Sources tell TMZ .... Justin and one of his male neighbors got into a verbal altercation just after 9 AM. We're told the argument was intense.
L.A. County Sheriff's spokesperson Steve Whitmore tells TMZ ... the accuser told deputies Justin made physical contact with him and he has filed a battery report. He also claims Justin threatened him.
Sources connected with Justin's security tell TMZ ... the neighbor came on to Justin's property and began screaming that while Justin was away (overseas) there were people at the house having loud parties.
Our sources tell us Justin told the man to get off his property ... but they insist Justin did not have any physical contact with the man.
Sources connected with JB's security tell us the singer went inside his house and security escorted the neighbor off the property.
The Sheriff's Dept. is investigating.
Justin Bieber -- Investigated for Battery | TMZ.com