A man has suffered serious head injuries in an attack in Chippenham.
Wiltshire Police said the assault happened at 04:00 BST on Saturday in the car park on Bath Road in the town.
Two men, aged 20 and 19, were arrested at the scene on suspicion of causing grievous bodily harm. The younger man was also held on suspicion of affray.
Police said they have no information about the victim's age or where he is from. He is being treated in hospital.
Det Con Justine Parsons, from Melksham CID, said: "There were a lot of people around at the time of this assault, and I would appeal for anyone who witnessed the incident, or the events leading up to it, to come forward and speak to us."