Newyork. UN Secretary-General Ban Ki-moon has warned the crisis on the Korean peninsula may become "uncontrollable”.He once again urged North Korea to tone down its "provocative rhetoric” and to keep open a joint North-South Korean industrial complex.Also on Tuesday, North Korea warned foreigners in South Korea to take evacuation measures in case of war.Pyongyang has been making bellicose threats against South Korea, Japan and US bases in the region.Speaking to reporters in Rome, Mr Ban said: "If any small incident is caused by miscalculation or misjudgement, it may create an uncontrollable situation.’’He also called for the Kaesong Industrial Complex to be kept open, calling it "one of the most successful cooperative projects between the South and North”."This should not be affected by political considerations. This is a purely economic place,” he went on. North Korean employees did not report for work at the complex on Tuesday, suspending one of the few points of co-operation between North and South Korea.Meanwhile, a statement attributed to Pyongyang’s Asia-Pacific Peace Committee on Tuesday said: "The situation on the Korean peninsula is heading for a thermo-nuclear war."In the event of war, we don’t want foreigners living in South Korea to get hurt.”