1996 Gangneung submarine infiltration incident

The 1996 Gangneung submarine infiltration incident began on 18 September 1996 near the South Korean city of Gangneung when North Koreans abandoned their grounded submarine and hid within the city, resulting in a 49-day manhunt for the belligerents. The incident was one of the more serious instances of North Korean espionage involving the Reconnaissance Bureau (reconnaissance team and 22nd Squadron of the Maritime Department of the Reconnaissance Bureau).

Source: Wikipedia — 1996 Gangneung submarine infiltration incident (CC BY-SA 4.0)