Awards , was scheduled to perform at the show . His girlfriend , singer Rihanna , abruptly canceled her planned Grammys performance , but neither her spokesman nor the show organizers gave a reason . `` Rihanna is well , '' her spokesman said in a written statement . `` Thank you for concern and support . '' Watch the latest developments in the case '' Brown , 19 , and Rihanna , 20 , were seen together Saturday night at a pre-Grammys dinner at the Beverly Hills Hilton , about five miles from where police said the alleged incident happened at 12:30 a.m. Sunday . The police statement said Brown and a woman were in a vehicle near Hollywood 's Hancock Park when `` they became involved in an argument . '' `` After stopping his car , Brown and the woman got out and the argument escalated , '' police said . After receiving a 911 call at about 12:30 a.m. Sunday , officers found the woman at the scene of the alleged fight , but Brown had left , the department said . Investigators were treating the incident as a possible felony battery case , police said
LOS ANGELES , California -LRB- CNN -RRB- -- The woman allegedly assaulted by singer Chris Brown in Hollywood early Sunday was his girlfriend , singer Rihanna , according to sources close to the couple . Chris Brown attends a party saluting music producer Clive Davis in Beverly Hills , California , on Saturday . While Los Angeles Police have a policy against identifying alleged domestic violence victims , two people who know both Brown and Rihanna confirmed she was the woman police said had `` suffered visible injuries and identified Brown as her attacker . '' Brown , 19 , turned himself in to police Sunday night after police said they were looking for him . He was arrested on suspicion of making criminal threats . Brown was later released on a $ 50,000 bond and given a March 5 court date . `` Detectives investigating the alleged domestic violence felony battery booked him for criminal threats , '' a statement from the Los Angeles Police Department said . `` At the time the case is presented to the Los Angeles County district attorney 's office , additional charges may be filed . '' Brown , nominated for two Grammy