CHRIS BROWN UNDER INVESTIGATION FOR ASSAULTING RIHANNA

Singer Chris Brown is being investigated by the LAPD in an alleged assault on a female.

According to police, Brown and a woman were arguing inside a vehicle around 12:30 this morning when suddenly things allegedly turned violent, TMZ reports.

Cops say they received a 911 call, and when they arrived they noticed the woman had visible injuries. She then identified Brown as her attacker. Cops say Brown had left the scene by the time police arrived.

Theybf reports that early in morning while leaving Clive Davis’ party, the two got into a physical altercation in their limo and he punched Rihanna in the face. That’s when he/the limo dropped her at Hancock Park in L.A., and she ran and called 911. He left the scene.

Chris Brown has officially been booked into the custody of the Los Angeles Police Department.

Brown has been charged with one count felony criminal threats. His bail has been set at $50,000.

According to MediaTakeOut, Rihanna is at the hospital now . She filed a police report on Chris, though she left her name out of the report.

One of Rihanna's friends says she is bruised and upset, but she did not suffer any SERIOUS injuries.

Rihanna and Chris Brown pulled out of performing at the Grammys.

Image WENN