R&B star Chris Brown has been arrested in Washington, D.C. over allegations of assault, according to a U.S. report.

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

According to Tmz.com, Brown is currently in police custody while the unidentified other party was taken to hospital for a medical evaluation.

The singer has been under a five-year probation order since assaulting his then-girlfriend Rihanna on the eve of the Grammy Awards in 2009.