A woman has died in a horror boating accident in Mandurah.
Police were called to the scene off Mandurah Terrace near the Mandurah Bridge around 10pm on Saturday.
Police say a boat with four people on board collided with a red post marker in the estuary.
A 54-year-old woman was recovered from the water but could not be revived and died at the scene.
A 52-year-old woman was also thrown into the water.
On Sunday afternoon WA Police issued a statement saying her body had been found.
Shortly after they retracted the statement and confirmed she was still missing and the search was ongoing.
A 47-year-old man, who was believed to be driving the boat, was taken to hospital with serious injuries.
A second man, aged 54, was not injured in the crash.
Anyone with information regarding this incident is asked to contact Crime Stoppers on 1800 333 000 or report online at crimestopperswa.com.au