Aboard the submarine were twenty-one crew and and the director and vice director of the Maritime Department. South Korean airborne and special-forces troops embarked on a forty-nine-day manhunt that saw all of the North Koreans except for one killed or captured. Many committed suicide or were murdered by their superior officers to prevent capture. The remaining North Korean sailor, or agent, is believed to have made his way back across the DMZ. Eight ROK troops were killed, as were four South Korean civilians.
In 1998, a Yugo-class midget submarine, predecessor to the Yono class, was snared in the nets of a South Korean fishing boat and towed back to a naval base. Inside was a macabre sight: five submarine crewmen and four Reconnaissance Bureau agents, all dead of gunshot wounds. The crew had been murdered by the agents, who promptly committed suicide. The submarine was thought to have become entangled in the fishing boat’s net on its way back home to North Korea, after picking up a party of agents who had completed a mission ashore.
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