Three men have gone on trial in Turkey over the murder and attempted rape of a 20-year-old student — a case that sparked widespread protests denouncing violence against women.

Ozgecan Aslan's body was found burned and mutilated in a riverbed in February, two days after she was last seen on a minibus.

The driver, Suphi Altindoken, his father and another accomplice have confessed to the killing and face life in prison.

The brutal killing led to an outpouring of anger, mass demonstrations and allegations that the government was not doing enough to protect women.

On Friday, hundreds of women gathered outside the courthouse in Tarsus, southern Turkey, calling for action to protect women.

Hundreds of lawyers have volunteered to represent the victim.