Emergency services from around the state have been deployed after a yacht overturned with six crew members on board.
A yacht competing in the Bunbury Return Ocean Race has overturned 11 nautical miles south west of Mandurah.
It's understood of the six person crew, one person is deceased with an air and water search now taking place.
Around 11:30pm last night a distress beacon was set off by a 15m yacht named Finistere.
The Australian Maritime Safety Authority attempted to contact the vessel via radio but was unsuccessful.
Finistere then failed to update its race tracker at midnight.
At the same time Fremantle Water Police and the Department of Fire and Emergency Services were called to attend the incident.
By 12.30am an RAC rescue helicopter arrived at the scene and two other competing yachts, Huckleberry and Force Dimension, spotted the overturned vessel in the water.
Five of the six crew were safely recovered.
One member is believed to be deceased and a search is currently underway.
A 90 square nautical mile search are has been identified, it is 22 square nautical miles south of Mandurah.
Two RAC helicopters, an ASMA Challenger search and rescue jet, Fremantle Water Police and Mandurah Volunteer Marine rescue Group have been deployed to the search.
The conditions on the water are tracking around 22-30 knots, quite windy with 3-4m seas.
Madora Bay man charged after police find stolen items on Nambeelup property
Authorities work to contain crude oil spill in waters off Kwinana
Alcoa Children's Festival returns to Kwinana
Armed man arrested in Port Kennedy
Rockingham, Port Kennedy teens charged over serious Northbridge assault
Police seek witnesses to serious crash in Pinjarra
Local artist Emma Blyth inspires community to raise $10k for Mandurah kids facing hunger
Hunt continues for Baldivis ATM thieves
Channel 7 Mandurah Crab Fest a cracking success