Washington, Feb 27 : Chris Brown's March 5 court date over his alleged bust-up with Rihanna is likely to be postponed while cops strengthen their case against him, says Los Angeles district attorney.

The `Kiss, Kiss' hitmaker is due in Los Angeles court on 5 March (09) for an arraignment hearing but the date may have to be pushed back, while police gather more evidence against the star, reports Contactmusic.

"We don't have the evidence yet. (Los Angeles police detectives) are still investigating. If (detectives) determine they need more time they'll set a new date for him (Brown) to come into court. He only has to come back if and when we file charges," a statement from Los Angeles district attorney spokeswoman Jane Robison read.

Brown was arrested and charged following an alleged attack on the `Umbrella' hitmaker after a pre-Grammys party on 8 February (09).

Brown was freed on bail following the incident and is facing charges of making criminal threats. (ANI)