A woman has died at a residence on Lanyon Street this morning.
Police officers and Forensic Detectives were called to an address at Lanyon Street in Mandurah this morning after a woman died.
Police have cordoned off a section of the street at the France Street intersection while they complete their initial investigations.
At 8:30am officers were called to the address and found a woman deceased and a man collapsed inside.
The man was taken to hospital by ambulance for assessment.
He is in a serious but stable condition.
Inspector Peter Davies said he was hopeful the male would be able to help police with their enquiries.
"Mandurah Detectives along with our homicide squad are trying to determine exactly what has or hasn't occurred here," he said.
A neighbour said he heard a woman yelling, glass breaking and a door being kicked in before the street fell silent.
Not long after, police swarmed the street.
Police have so far been unable to contact the deceased next of kin.
Anyone with information should contact police on 131 444 or Crime Stoppers.
Tragic update in search for missing man Robert Snyder
Premier Roger Cook to leave Kwinana electorate, move to Perth
Mandurah Marine Rescue's new vessel named in memory of nun who survived 1959 boating accident
Teen dies in motorbike crash at Waroona Dam
Shark alert issued after whale carcass reported at Preston Beach
Kwinana businesses to refuse serving students during school hours
Men attacked, campervan windows smashed in East Rockingham
Entries for 2026 Castaways Sculpture Awards now open
Meadow Springs man pleads guilty to threatening to kill PM and NSW Premier