A man in his 20s suffered serious head injuries during an assault in King’s Lynn town centre.
Police were called to the Old Cattle Market car park at Sainsbury’s just before 4.30am on Saturday.
The victim, who has not been identified, was found with serious head injuries and was taken to Addenbrooke’s Hospital in Cambridge where he remains in a stable condition.
The area around the car park was cordoned-off on Saturday while detectives and forensics officers worked at the scene.
A 23-year-old man was arrested in connection with the assault.
He was bailed until Wednesday, October 30 while investigations continue.
Witnesses are asked to call Lynn CID on 101 quoting incident 62 of Saturday, October 12.
Alternatively, call Crimestoppers anonymously on 0800 555111 with any information.