Police are appealing for witnesses to a serious assault in Marine Parade, Worthing, which took place around 1.35am on Saturday, March 19.
When officers arrived they found the victim lying unconscious on the grass area outside AMF Bowling alley, being attended to by some members of the public.
It appeared the victim had been hit over the head with an object.
He was taken to hospital with serious but non-life threatening injuries.
DC Lynette Atkins said: “We would like to speak with anyone who has dashcam footage from around the time of the incident.
“If your car was parked around the area at the time of the incident please check the camera to see if there is any footage which could help us with our investigation.
“There was a lot of commotion at the time so if you do remember hearing or seeing anything from that night please get in touch.”
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