The “I Believe I Can Fly” singer, who’s awaiting trial on a series of child sex abuse charges, was sitting on his bed in his cell at the Metropolitan Correctional Center when a fellow inmate walked in and started punching him, TMZ reported, citing federal law enforcement sources.

The belligerent resident apparently was upset over recent lockdowns largely caused by protests related to Kelly outside of the jail, the outlet reported.

Kelly was examined by a doctor and was not seriously injured in the fracas, which was brief and quickly broken up, TMZ said.

The accused rapist’s attorney Steven Greenberg declined comment to the outlet, saying only Kelly has been a model inmate.