Officers are appealing for witnesses to a road traffic collision in Kettering in the early hours of Sunday (June 23).
A silver Vauxhall Astra was travelling along Barton Road, from Kettering, when the vehicle left the road and overturned, landing on its roof in Wicksteed Park. No other vehicles were involved. The incident occurred at about 3am.
The driver, a 23-year-old man from Thrapston, was taken to Kettering hospital with suspected head injuries.
Anyone with information or who witnessed this incident is asked to call the Drivewatch Hotline on 0800 174615 or Northamptonshire Police on 101.