▲ This image, provided by South Korea's East Regional Coast Guard, shows the location, marked with a red cross, of where one crew member aboard a North Korean auxiliary ship is believed to have gone missing following the sinking of the vessel in international waters about 200 kilometers off the southeastern city of Pohang, on Sept. 17, 2026. (PHOTO NOT FOR SALE) (Yonhap)

POHANG, South Korea, Sept. 17 (Yonhap) -- An auxiliary ship belonging to a North Korean merchant vessel sank in international waters between South Korea and Japan on Thursday, leaving one crewman missing while three others were rescued, Seoul authorities said.

The South Korean Navy notified the East Regional Coast Guard Headquarters of the sinking at around 10:50 a.m., after the auxiliary craft went down in waters roughly 200 kilometers off the southeastern coastal city of Pohang, Coast Guard officials said.

All four crew members aboard the ship had gone missing at first, but three of them were rescued by the Japan Coast Guard, according to South Korean authorities.

The Korea Coast Guard has joined search-and-rescue operations to locate the missing crew member, based on international law and humanitarian principles, officials said.

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