Three men, two aged 18 and one aged 17, were killed when the silver BMW left the road on the A415 in the village of Marcham shortly after midnight.

All those who died were from Oxfordshire and their families have been notified and are being supported by specially-trained police officers.

The 18-year-old driver of the vehicle is in hospital with life-threatening injuries.

Thames Valley Police have asked witnesses of the collision to come forward.

Sergeant Matt Cadmore, of the Joint Roads Policing Unit at Three Mile Cross, said: "This is an extremely tragic incident which has resulted in the deaths of three young men.

"Our thoughts remain with their families and friends at this extremely difficult time.

"I would appeal to anyone who may have witnessed this incident or may have dash cam footage prior to the collision and who has not already spoken to police to contact us."