A woman has died and a man is in hospital after a boat ran into a navigation device in Perth's south.
Police were called to Mandurah estuary about 10pm on Saturday night after a boat with four people on board struck a red post marker.
A 54-year-old woman was recovered from the water but could not be revived and died at the scene, police confirmed in a statement on Sunday.
A 47-year-old man, believed to be the boat's driver, was taken to hospital with serious injuries, while a 54-year-old man was uninjured.
Emergency services are searching for a 52-year-old women who remains unaccounted for.
