A 22-year-old man was seriously injured in an incident on the A361 at Chipping Warden, early Sunday morning.
At about 5am a black Seat Ibiza FR, left the road and collided with a tree. The driver was taken to John Radcliffe Hospital in Oxford with multiple broken bones.
Police would like to speak to anyone who may have witnessed this incident or who may have witnessed a black Seat Ibiza travelling on the A361 in the early hours of Sunday morning to contact them.
Witnesses or anyone with information is asked to contact police on 0800 174615.