On 22 June, a North Korean Yugo-class submarine became entangled in a fishing driftnet in South Korean waters approximately 18 kilometres (11 mi) east of the port of Sokcho and 33 kilometres (21 mi) south of the inter-Korean border.

[1][2] The submarine sank as it was being towed into port; it was unclear if this was as a result of damage or a deliberate scuttling by the crew.

[3] On 23 June, the Korean Central News Agency admitted that a submarine had been lost in a training accident.

[6] Log books found in the submarine showed that it had infiltrated South Korean waters on a number of previous occasions.

[7] The bodies of the members of submarine crew were subsequently returned to North Korea in a ceremony that took place in Panmunjom on 3 July 1998.