A fatal assault inside a home south of Perth has sparked a homicide investigation.
The victim, aged in his 40s, was found with serious injuries after reports of an assault inside a Greenfields home on Sunday morning.
Police and paramedics treated the man at the scene, near Mandurah, but he died of his injuries.
No suspect has been arrested over the 1.45am incident.
Detectives on Sunday evening went public to seek CCTV, dash-cam or mobile phone vision recorded in the Renison Drive and surrounding area between 11pm on Saturday and 2.30am on Sunday.
Footage showing any persons or vehicles in the area at the time can be shared with investigators directly.