A man was found with a serious head injury inside a car which flipped on to its side in the middle of a road.
The driver was taken to the Queen's Medical Centre by air ambulance after residents heard a collision, which involved a Silver Kia Sorento car in Great North Road, Weston,
Emergency services were alerted to the incident at around 7.20pm on Wednesday (July 21).
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The road was closed until 10am this morning while police carried out a forensic investigation.
Investigators are now working to establish how the incident happened.
Sergeant Craig Luckett, of Nottinghamshire Police's serious collision investigation unit, said: "We are currently working to establish how this incident came to happen and are appealing to anyone who may have any information that could help.
"If you were passing the area around the time it happened and saw anything suspicious on the roads or if you have dash-cam footage, we'd be really keen to hear from you.
"The man remains in a serious but stable condition in hospital and our thoughts are with him and his family who are being supported at this time."
People with information are asked to call Nottinghamshire Police on 101 quoting incident 779 of 21 July.
Alternatively, please contact Crimestoppers anonymously on 0800 555 111.
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