Las Vegas police are investigating an allegation of battery against Chris Brown, the R&B singer who drew headlines when he was charged in 2009 with beating then-girlfriend Rihanna.

A police statement Saturday evening said an altercation took place in a room at the resort when the woman went to take a picture of Brown.

The woman said she was struck by Brown and that he had taken her cellphone, police said.

Detectives tried to speak with Brown at his hotel room, but the singer left before police had arrived.

A crime report has been taken for misdemeanor theft and misdemeanor battery listing Brown as a suspect, police said.

Nicole Perna, publicist for Brown, issued a statement Saturday night calling the woman’s charges “Unequivocally untrue.”

Brown performed Friday at Drai’s nightclub at The Cromwell Las Vegas, w he appears regularly.

TMZ posted a photo of Rihanna’s injuries turning Brown into an object of intense criticism, Reuters reported.