Las Vegas police are investigating Chris Brown for possible misdemeanor battery and theft after a woman claimed he assaulted her and took her cell phone during an altercation at a party in a hotel room.

The 26-year-old R&B star was not arrested or charged with a crime. His rep told E! News in a statement that the woman's accusations are "completely false." She has not commented publicly. Brown has undergone much legal turmoil involving other incidents over the past six years, including a 2009 attack against Rihanna, and his probation ended last March.

Police said that on Saturday morning, they were notified about a report of battery that had allegedly occurred inside a hotel suite at the Palms Casino Resort. Officers arrived at the scene and encountered a woman who "appeared to have minor injuries sustained as a result of a battery." They said an investigation indicated she had attended a party inside a hotel room and that an altercation took place over a cell phone when she went to take a picture of Brown.

"The victim was alleged to have been battered by Brown, who at the same time took her cell phone," police said in a statement.

"A crime report has been taken for misdemeanor theft and misdemeanor battery listing Mr. Brown as a suspect," the statement read, adding that the investigation was ongoing and that detectives have not been able to contact the singer.