Las Vegas police are investigating an allegation of battery against R&B singer Chris Brown.
Lieutenant Jeff Goodwin says authorities received a call shortly before 10.30am on Saturday about the alleged battery at the Palms Casino Resort.
A police statement on Saturday evening said an altercation took place in a room at the resort when the victim went to take a picture of Brown.
Police say the victim said she was struck by Brown and that he had taken her mobile phone.
Detectives tried to speak with Brown at his hotel room, but the singer left before police had arrived.
Police say a crime report has been taken for misdemeanour theft and misdemeanour battery listing Brown as a suspect.
Brown's lawyer and publicist did not immediately return messages seeking comment.
The singer performed on Friday at Drai's nightclub at The Cromwell Las Vegas, where he appears regularly.
