Emergency services searching for a surfer believed to have been killed in a shark attack off South Australia's Eyre Peninsula say they have recovered the man's board, and that several people witnessed the incident.
The 46-year-old man from Elliston was surfing at Walkers Rocks Beach on the Great Australian Bight when he was attacked an estimated 30 to 50 metres offshore, and is now missing.
Police and the State Emergency Service (SES) were called to the spot, about 7 kilometres north of Elliston, after 10am.