POLICE are investigating an incident which has left a 36-year-old man fighting for life in hospital.
About 5.30pm last night, police were called to a house in Wundu Entrance, South Guildford.
The man was located inside with injuries to his head.
St John Ambulance conveyed the man to hospital where he is currently in a critical but stable condition.
Police would like to speak to anyone who was in the street around this time, or that has information that can assist with their investigation.
Anyone with information is asked to call Crime Stoppers on 1800 333 000 or to make a report online at crimestopperswa.com.au.