Only a pair of goggles has been found in the search for a British dad killed by a 14th great white shark - with reports suggesting he may also have been attacked by a tiger shark.
Paul Millachip, 57, was swimming in the sea off Western Australia when he was dragged underwater at around 10am local time on Saturday.
Witnesses said a large shark was seen in the water just moments before the man was killed.
Today, it emerged that Perth police are investigating accounts that Mr Millachip was also attacked by a second shark - a tiger shark - before he was pulled under the water.
Mr Millachip's wife Thirl, 59, said two teenagers on a boat witnessed the attack and tried to help, but could not do anything to save him.
She explained: "It came out of the blue. But it did happen, you just have to deal with it.
"It must have been an absolutely terrifying experience for them, so my heart goes out to them.
"I thank them for what they did. Amazing. They could potentially have saved other lives."
Police Acting Inspector Troy Douglas said the teenagers alerted other swimmers and people on the beach, avoiding potential further tragedies.
He told ABC News : "They have been really, really helpful. They have done a great job of alerting other people on the beach and other swimmers."
Yesterday, police called off the search for the father-of-two, after finding only a pair of goggles believed to belong to him.
The goggles are now due to be tested, according to reports.
At least five Water Police and Sea Rescue boats and two helicopters were involved in the search effort and an ambulance was sent to the scene.
Beaches nearby were closed while police looked for the missing man, but sadly could not find him.
Mr Douglas said the search had been thorough and would only resume if there was "reason".
He explained: "Inquiries will continue based on anything washed up or anything found."
Paying tribute to her husband, Mrs Millachip said: "Rest in peace Paul. He died doing what he enjoyed doing the most, which was exercising.
"He was a wonderful man, a wonderful father, and he loved his exercise."
