A driver crashed into a tree after colliding with a roundabout when he lost control of his car.
Two men were trapped in the grey Audi A6 after it propelled from the carriageway onto the top of the roundabout where it hit a tree.
Both men were seriously injured and treated in the John Radcliffe Hospital in Oxford.
The crash happened at 2.40am on July 20 as the men were travelling on Saxon Street towards Dansteed Way before the driver lost control at the Stanton Wood roundabout.
They both had to be cut out from the car by firefighters.
If you have any information about the collision please contact investigating officer PC Samantha Silk from Roads Policing based at Milton Keynes via the 24-hour Thames Valley Police enquiry centre on 101 quoting URN 298 20/7.
If you don’t want to speak directly to the police, you can contact Crimestoppers anonymously on 0800 555 111.
No personal details are taken, information is not traced or recorded and you will not go to court.