Authorities are currently investigating a shark bite incident at a South West beach.
It's believed a male surfer was attacked by a suspected white shark at Boat Ramp Surfing Spot near Gnarabup Beach around 8.45am on Monday.
The extent of the surfer's injuries is unclear.
Surf Life Saving WA reported a white shark sighting at Gnarabup Beach in Prevelly about 9am on Monday.
Officers from the Shire of Augusta Margaret River have closed beaches from Gas Bay to Margaret River Mouth.

Locals urged to look out for man who removed electronic monitoring device
Four charged over brutal Warnbro home invasion allegedly linked to illicit tobacco trade
WATCH: Whale beached at Long Point
City of Rockingham records steep increase in animal cruelty complaints related to untreated medical conditions
Accused dirt bike hoons charged by Mandurah Police
Heavy rainfall, thunderstorms to lash Mandurah down to Busselton
Drivers escape serious injury after West Pinjarra, Baldivis crashes
Police investigate stabbing of two men at Warnbro home
Shark sighted in Dawesville Channel
