The move marks the first time that no South Koreans are at 9-year - old industrial complex . North Korea suspended operations at the joint economic zone last year . North and South Koreans had worked at the Kaesong Industrial Complex in the past . The suspension also took place during the annual U.S.-South Korean joint military drill . The complex houses the headquarters of more than 120 South Korean companies .
The move marks the first time that no South Koreans are at 9-year - old industrial complex . North Korea suspended operations at the joint economic zone last year . North and South Koreans had worked at the Kaesong Industrial Complex in the past . The complex houses the headquarters of more than 120 South Korean companies .