An English tourist had his foot bitten off by a shark while another was bitten during the attack in the Whitsunday Islands near Australia's Great Barrier Reef on Tuesday, officials said.
The 28-year-old man has had his right foot amputated, and the 22-year-old man has been mauled on the right calf. The pair have been then flown by helicopter to a hospital within the metropolis of Mackay, in accordance with the air transport service RACQ CQ Rescue.
The men told the rescue crew they were wrestling and thrashing about in the water when the attack occurred, Reuters reports.
The men were attacked while snorkelling in the water near Hook Passage, a body of water between Whitsunday Island and Hook Island which is popular for water activities.
Two foreign paramedics were on board the boat and provided initial first aid as the men were rushed back to the shore, Eastwick said.
While shark attacks are very rare, this is not the first time that the Whitsunday Islands have borne witness to them.
The two men have been identified by the Courier-Mail as Alistair Raddon (28), who lost his foot, and Danny Maggs (22).
The Mackay-based rescue helicopter was tasked about 10.30am and touched down on the Whitsunday PCYC oval in Airlie Beach about 11am.
The attack has received wide coverage in the British press with The Sun reporting the attack as a "shark rampage" while the Daily Express reported a "terrifying shark launches a brutal attack".
"They've applied tourniquets to both patients and continued treatment into Coral Sea Marina".
It said Queensland Ambulance Service had confirmed that the men's injuries are serious but non-life-threatening.
They were transported in a serious but stable condition, paramedics said. They're both conscious and breathing.
"One is believed to be quite serious, and the other not as serious", the spokeswoman said.