Police are investigating the suspicious death of a man in central Mandurah overnight.
A spokesman said a 28-year-old man was found in a carpark on Pinjarra Road about 8.30pm.
He had critical head injuries and was taken to hospital by St John Ambulance.
He died in hospital last night.
Forensic and Major Crime Squad officers are at the scene at the corner of George Street and Pinjarra Road. Police are also scouring a vacant lot on Boundary Road.
Boundary Road residents told police they heard yelling sometime between 8pm and 9pm.
One of those was Shirley, whose nephew David Liam Johnson was murdered in Swanbourne less than a fortnight ago.
"I kept thinking of my nephew who was murdered last Friday night, it just makes me feel sick," she said. "I hope they find who has (killed) David and who has done this. It's the families that suffer as well. "I just feel for the other chap's family."
Her neighbour Alan, who did not want his surname revealed, heard someone shouting 'get out of here, get away from me' and a shout of 'come here'.
Five minutes later it was quiet, he said.
A man who lives on nearby Boundary Road has told police he heard loud yelling.
"All I heard was a bloke yelling 'get off me, get off me'," he said. "It was really loud but I didn't think much else of it."
Pinjarra Road is closed to traffic and pedestrians from Sutton Street to Boundary Road.
Drivers are advised to avoid the area and seek alternative routes where possible.