Rihanna suffered “horrific” injuries after an alleged assault by her boyfriend Chris Brown, US reports claim.

The Umbrella singer is believed to have bite marks on her arms and major contusions to both sides of her face, a split lip, swelling, bruising and a bloody nose, according to showbiz website TMZ.

US sources said he lashed out after the Umbrella singer accused him of flirting with another woman.

Martial arts expert Brown is said to have fled after the 12.30am bust-up at the roadside in LA’s swanky Hancock Park area.

He allegedly went into hiding in a hotel and later handed himself in to cops.

Meanwhile Rihanna, 20, was rushed to hospital after dialling 911 from the hired car.

A source said: “Rihanna was distraught, she had bruises on her face, a bloody nose and sore lip. She was interviewed by police at the hospital before being released a few hours later.”