A man in his 70s has died and a woman is being treated in hospital for serious injuries following what police believe was a family violence incident in Kelmscott.
Police were called to the home after 7:00 this morning and found a severely injured man and woman.
The man later succumbed to his injuries while the woman, who is also aged in her 70s is being treated in hospital.
A man in his 40s, who is known to the pair, also suffered injuries but has been arrested and is under police guard in hospital.
He is assisting the Homicide Squad with their inquiries.
Police have issued a call for any witnesses to contact them through Crime Stoppers on 1800 333 000.