At least ten people died when a South Korean fishing charter boat capsized off the country's southwest, the coastguard said Sunday.
The 9.77-tonne Dolphine went missing near the island of Chuja Saturday night and its wreckage was found on an island nearby Sunday morning, the coastguard said.
Three people were rescued and 10 bodies have been found so far, it said, adding it was unclear how many were on board.
A public passenger record showed 22 people on board, but at least four people on the list were confirmed to have not boarded the vessel, it said.
One of the three survivors was also not on the list, it said, adding search efforts involving dozens of ships and divers were underway.
One survivor said the boat capsized "in an instant," before many passengers were swept away by strong waves.
"I was sleeping when the boat's engine went off and the captain told us to get out and water started to fill the boat," the 38-year-old survivor surnamed Park told Yonhap news agency.
Park said he and other survivors climbed on top of a floating piece of the boat and held on for more than 10 hours before being rescued.
Many passengers were not wearing life vests when the accident took place, Yonhap quoted the survivors as saying.
A lack of safety measures and inaccurate passenger records prevalent among ship operators were heavily criticised after the Sewol ferry disaster that killed more than 300 people in 2014.
Officials then vowed to overhaul public safety measures and toughen punishment over violations of safety rules. But critics say little has changed since the tragedy.