SEOUL: Ships searching in wind-whipped waters between South Korea and Japan have picked up at least 14 of the 22 crew members from a cargo ship that sank on early Wednesday morning.

South Korean officials said nine of them remain unconscious, but they did not immediately confirm any deaths. They said the crew members would be airlifted to Japan for treatment.

South Korean and Japanese coast guard vessels and aircraft, as well as two commercial cargo ships, continue to search for the eight missing crew members, but strong winds and waves were slowing their efforts, South Korean officials said.

The Japanese coast guard confirmed the rescue of at least 13 crew members and said five of them — all Chinese — were still alive.

The 6,551-ton Jin Tian sank about three and a half hours after it sent a distress call at about 11:15 p.m. on Tuesday in Japan's exclusive economic zone, Japanese coast guard spokesman Shinya Kitahara said.

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The vessel, which was Hong Kong-registered and carrying lumber, sank about 160 kilometers (100 miles) southwest of the city of Nagasaki in southern Japan and about 150 kilometers (93 miles) south of South Korea's Jeju island.

The captain last communicated with the coast guard through a satellite phone at about 2:41 a.m., saying crew members would abandon the ship, minutes before it sank, Jeju coast guard officials said.

Six crew members were picked up by South Korean coast guard vessels, while a cargo ship picked up five and Japanese aircraft picked up three.

According to South Korean and Japanese officials, 14 crew members are Chinese and eight are from Myanmar. According to maritime transport websites, the vessel left Malaysia's Port Klang on December 3 and was headed for South Korea's Incheon port.

The ship is owned by Long Bright Shipping Ltd., a Hong Kong-registered company that is a subsidiary of Shenzhen Shekou Shipping Transportation Co. Ltd., according to a July 2022 filing made by the parent company to China's National Equities Exchange and Quotations. The filing says the Jin Tian was used as collateral for a loan that was later repaid.

Calls to a number listed for Shenzhen Shekou Shipping Transportation in mainland China went unanswered on Wednesday during the weeklong Lunar New Year holiday.

South Korean officials didn't immediately say whether the nine who were unconscious were likely to survive their injuries if they weren't already dead. They said the five other crew members who were rescued were either conscious when found or regained consciousness after being rescued.

Kitahara said the cause of the ship's sinking was not immediately known, and there were no signs that it collided with another vessel. He said the arrivals of Japanese patrol boats and aircraft were delayed by difficult weather following the sinking.

Officials at Jeju's coast guard say a strong wind warning was issued for the area earlier on Wednesday but was later lifted. Winds were blowing at about 16 meters per second in the area as of 7 a.m., creating waves that were 3 to 4 m high.

The Japanese coast guard said the water in the area remained rough and its temperature was about 14 degrees Celsius.