A major surfing tournament in Australia has been called off following two shark attacks in the area.
The World Surf League (WSL) said the final days of the Margaret River Pro event in Western Australia would be cancelled due to safety concerns.
On Monday, two recreational surfers survived separate attacks in Gracetown, about 6km (3.8 miles) from the event.
The first man was treated for serious leg injuries. The second man suffered a minor bite to his thigh.
The event had been suspended for an hour after the first attack on Monday.
But organisers said "actively aggressive sharks" remained in the area on Wednesday, possibly due to the presence of nearby beached whales.
"Current circumstances are very unusual and troubling, and we have decided that the elevated risk during this season's Margaret River Pro has crossed the threshold for what is acceptable," chief executive Sophie Goldschmidt said.
"The WSL puts the highest premium on safety. This cannot be just talk, and it cannot be compromised."
Some competitors, including Brazilian Italo Ferreira, had expressed concerns about returning to the water.
"Two shark attacks in less than 24 hours here in Australia, just a few kilometres from where the event is being held," he wrote on Instagram.
"Very dangerous, don't you think? Is the safety of athletes not priority?"
Another Brazilian surfer, Gabriel Medina, wrote: "I do not feel safe training and competing in this kind of place, any time anything can happen to one of us."
Medina endured a shark scare during a competition in South Africa last year when he and Australian surfer Mick Fanning had to be removed from the water.
The first man to be attacked on Monday, Alejandro Travaglini, underwent surgery after being mauled by what he said was a white pointer shark, also known as a great white.
Mr Travaglini, 37, had managed to escape the shark and bodysurf back to shore with the help of other surfers.
"I just want to thank all the legends who helped me up the beach," he said after his surgery.
The second man was attacked a few hours after Mr Travaglini at a nearby beach, despite it being closed by authorities. He was treated by paramedics for minor injuries.
The Margaret River Pro had been due to conclude on Sunday.