Police want to speak to a 27-year-old man in relation to an alleged "coward punch" attack at a Mandurah pub on Tuesday afternoon that has left a man fighting for his life.
The incident occurred at the Silver Sands Tavern on Mandurah Terrace around 4.30pm.
St John Ambulance paramedics treated the victim, also aged 27, for serious head injuries and possible spine injuries before he was rushed to Royal Perth Hospital.
WAtoday understands he was found unconscious after being punched in the face which caused him to fall backwards and hit his head on the corner of a wall.
The man's alleged attacker was not at the scene when emergency services arrived.
Mandurah Detectives are asking for the public's help to locate Jake Raymond Mosley who they believe could assist them in their inquiries into an assault.
Do you know where Jake Raymond MOSLEY is? He may be able to assist with an incident in Silver Sands. Call 131 444 if you know where he is. pic.twitter.com/3yhoY18PLQ
— WA Police (@WA_Police) September 21, 2016
He is known to frequent the Mandurah and Fremantle areas.
Anyone with information is asked to call Crime Stoppers on 1800 333 000.