Chris Brown has spoken out for the first time about his participation in the alleged assault on his girlfriend Rihanna.

The 19-year-old singer turned himself into police on Sunday (February 8) after both he and Rihanna cancelled their scheduled performances at the Grammy Awards.

He was later arrested on suspicion of making criminal threats.

Writing on his private Facebook page, Brown said "You'll begin to see her true colors. Believe it!"

It is unclear whether he was talking about Rihanna in the statement. Brown also changed his relationship status on the page to "single", reports the New York Post.

Rihanna was allegedly left needing hospital treatment after the attack, which is rumoured to have flared up as the couple travelled to their Los Angeles hotel together.