Chris Brown (Christopher Polk/Getty Images)

Chris Brown was reportedly arrested early Sunday in Washington, D.C., and charged with felony assault after a brawl outside of a hotel. 

Details are still being sorted out about exactly what happened at about 4:30 a.m. outside the W Hotel at 15th and K, but law enforcement sources told TMZ that Brown began punching an unidentified man during an argument.

The embattled R&B singer could face up to four years in prison if convicted of felony assault, TMZ says. He was placed on probation after a highly publicized 2009 attack on Rihanna. Since then, he has also been involved in brawls with Drake and Frank Ocean, but neither has resulted in criminal charges.

Read more at TMZ.