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.
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