Update: Singer Chris Brown has turned himself into police after an alleged assault of a female victim.
The LAPD is investigating the matter and charged Brown with felony battery.
The alleged assault took place at or near Hancock Park in L.A early this morning (February 8).
Police said they received a 911 call from an unidentified female earlier today and when they arrived, they found a woman with injuries.
While representatives for Rihanna told TMZ.com the singer was ok, a rep from The Recording Academy confirmed that neither Rihanna, nor Brown attended tonights Grammy ceremonies.
We have just been informed that Rihanna will not be attending tonight's 51st Annual Grammy Awards, a rep told AllHipHop.com. We're sorry she is unable to join us this evening." Rihanna's absence stemmed from a car accident the singer was involved in on Sunday morning, according to Entertainment Tonight.
A Grammy representative told the news show that Rihanna's face is slightly bruised from the accident.
No announcement was made as far as who would replace the vocalist on stage at the Grammys.
Representatives for the pair were unable to comment further as of press time.