A North Korean soldier watches the South Korean side at the border village of Panmunjom in the demilitarized zone (DMZ) in South Korea Thursday, April 4, 2013. South Korea's defense minister said Thursday North Korea has moved a missile with "considerable range" to its east coast, but said it is not capable of hitting the United States. (AP Photo/Yonhap, Lee Jong-hoon) KOREA OUT
SEOUL, South Korea (AP) -- South Korea is warning of a "grave measure" if North Korea rejects a call for talks on a jointly run factory park that has been shut down for nearly a month.
Unification Ministry spokesman Kim Hyung-suk on Thursday refused to describe what Seoul would do if Pyongyang doesn't respond by a deadline Friday to a demand for formal working-level talks.
But Seoul may be signaling it will pull out its remaining workers from the factory across the border in Kaesong. That could lead to the end of a complex considered the last remaining symbol of inter-Korean cooperation.
Pyongyang suspended operations in early April and withdrew its 53,000 workers.
Pyongyang has recently eased the near daily threats it issued for several weeks. But tensions between the rivals are still high.