Las Vegas police are investigating an allegation of battery against R&B singer Chris Brown that his representative says are untrue.

Lt. Jeff Goodwin said authorities received a call shortly before 10:30 a.m. Saturday about the alleged battery at the Palms Casino Resort. A police statement 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 cellphone. 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.

Nicole Perna, publicist for Brown, issued a statement Saturday night calling the woman's charges "unequivocally untrue."

The woman "was escorted out of the private after-party at the Palms Casino Resort for being disruptive and out of control," Perna said. "Once she was in the hallway, while waiting for Chris Brown's security to bring out her phone, she had a total meltdown -- throwing her purse to the ground and claiming that she 'could buy everyone in the hotel' -- as witnessed by numerous people waiting to get into the party. The Palms Casino Resort security also saw her wild behaviour via hotel security cameras and immediately came up to the hallway to escort her out of the hotel." 

"Her claim that she had her phone in her possession inside the after-party and was able to take a photo causing an altercation with Chris Brown is a complete fabrication," Perna said.  

The singer performed Friday at Drai's nightclub at The Cromwell Las Vegas, where he appears regularly.

Brown was freed from felony probation last year, more than six years after he attacked then-girlfriend Rihanna. The singer pleaded guilty to felony assault against the pop star in that case.

With files from Reuters