R&B star Chris Brown has been arrested and charged for felony assault in Washington, D.C.

The Kiss Kiss hitmaker was detained by cops in the early hours of Sunday (27Oct13) after a reported bust-up with another man outside the W Hotel.

Brown is currently in police custody while the unidentified other party was taken to hospital for a medical evaluation. The victim tells Tmz.com the singer broke his nose and he may need surgery.

He also alleges the fight was unprovoked and he was simply trying to have a little fun, photobombing two women who were taking a picture with the 24-year-old star.

But sources close to Brown are rushing to his defence, insisting the unnamed victim was not simply trying to have his picture taken with the singer; he was actually attempting to get on the star's tour bus.

The drama could lead to big problems for Brown, who is still on probation for his 2009 assault on then-girlfriend Rihanna. If a court rules his latest arrest violates his probation, the singer faces a four-year prison spell.