Two men had to be taken to hospital after the car they were in flipped off the road.
The black Honda Civic was driving along the B4012 near Thame when it left the road, rolled and ended up on its roof in a field.
The men, both believed to be in their twenties, were taken to the John Radcliffe Hospital in Oxford with minor injuries.
They have both since been discharged.
The incident took place at around 3.30pm on Sunday (May 19).
The road was closed until 5.30pm.
Police are appealing for witnesses to the crash to come forward.
Investigating officer PC Ed Turner said: “We would urge anyone who may have seen this vehicle just before or around the time of the accident to contact us as a matter of urgency so we can fully investigate the circumstances surrounding this collision.”
Anyone with information should call police on 101 or Crimestoppers anonymously on 0800 555 111.