A member of staff has been found collapsed at a Birmingham car wash and police say he may have been assaulted.
The man was found by a colleague at the premises in Gravelly Hill, Erdington, and was taken to hospital with a serious head injury, although it is not life-threatening.
A spokesman for West Midlands Police said the victim is in his 30s and is from Wolverhampton.
Officers cordoned off the car wash at 8.15am on Thursday for forensic examination.
The spokesman said police do not yet know how the man was injured but it is possible he was attacked.
Anyone who saw anything suspicious or unusual near the car wash on Thursday morning is urged to ring 08451 135 000 and ask to speak to detectives at Queens Road police station.