Homicide Squad officers, with the assistance of Mandurah Detectives, are investigating the death of a 27-year-old Greenfields man in Halls Head this morning.
The man was found about 5am on Leighton Road East with life threatening injuries.
He was taken to Peel Health Campus where he died a short time later.
Two men in their 20s are helping police with their investigation.
Anyone with information is asked to call Crime Stoppers on 1800 333 000 or make a report online at www.crimestoppers.com.au.