The Los Angeles Times, citing law enforcement officials familiar with the case and other sources it did not name, reported that Rihanna, whose full name is Robyn Rihanna Fenty, was the woman who told police that Brown had hurt her the night before the Grammy Awards.
A police statement released Sunday afternoon said Brown and an unidentified woman began arguing while riding in a car following a pre-Grammy party where they were spotted together Saturday night. The fight escalated when they got out of the car in the ritzy Hancock Park neighborhood, the report said, and Brown was gone by the time officers arrived.
A district attorney spokeswoman said police had not yet presented a case against Brown.
Brown was released after posting $50,000 bail. Both he and Rihanna had backed out of their scheduled performances at the Grammy Awards, where producers scrambled to fill their slots.
Rihanna's publicist declined to say why the singer did not appear, and Brown's representatives also refused to discuss the allegations or his arrest. Repeated phone and email messages left beginning Sunday night with Brown's attorney, Mark Geragos, were not returned Monday.
Wrigley said in a statement Monday that it was suspending its ad campaigns featuring Chris Brown as its spokesman for Doublemint gum until the situation was resolved, but stopped short of saying they will drop the troubled R&B star completely.
A company statement expresses concern about "serious allegations made against Chris Brown," but added that the 19-year-old should be "afforded the same due process as any citizen."
AP Special Correspondent Linda Deutsch contributed to this story.
By Anthony McCartney