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A 72-year-old Perth father has been stabbed to death and his son has been arrested.
The victim's wife was also injured as neighbours rushed to help and did CPR on the man.
Screams woke residents of Elsbury Approach in Clarkson in the city's north just before 6am on Tuesday.
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"It was pretty apparent quickly something sinister had happened and it wasn't anything minor, it was pretty serious," neighbour Adam McCreery, said.
An off-duty nurse rushed to help the victim, who had stab wounds.
She was unable to save him, and he died in the driveway.
His wife, 52, was also injured, and watched with their young daughter as emergency services rushed to the address.
She was taken to Royal Perth Hospital with serious injuries and is now in a stable condition.
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A man in his thirties was arrested at the home and was assisting police with their investigations.
It's understood he is the victim's son, from his first marriage.
The 52-year-old woman his stepmother.
So far no charges have been laid.
Homicide detectives are investigating.
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