A 25-year-old paddleboarder was hospitalized in critical condition with multiple injuries after being bitten by a shark on Saturday morning.
It happened around 9:30 a.m. local time at Kukio Beach in Kona, on the island of Hawaii. (Big Island), reported KHON-TV.
Fire officials said the unidentified man was standing 100-150 yards from the coast, the station reported.
The victim was transferred to the North Hawaii Community Hospital with multiple injuries to one hand and one leg. A hospital spokeswoman said the man was being operated on, KHON said.
The beach had no lifeguard at the service location, but there was a private security team present, KHON reported.
"Apparently, they had heard a scream from the ocean and they took a four-man canoe to find a male individual who had been thrown off his paddle board 100-150 yards from the coast," said the captain. firefighter Michael Grace to the station. "They recovered him from the ocean, he had injuries to the extremities on the right side."
People on the beach were able to apply multiple tourniquets to their right arm and leg before paramedics arrived, reported Honolulu Star-Advertiser.  The beach in the area was closed after the attack, KHON reported.
Details about the shark were not immediately available.
Dan Dennison, of the State Department of Land and Natural Resources, said that, according to the standard procedure, the closure of the beach signs that warn visitors about the presence of sharks are shown along a mile to each side of the attack for the rest of the day each time such an incident occurs.
A decision will be made on Sunday morning to reopen the beach, he said.
The Associated Press contributed to this story.