Pyongyang refused on Saturday to lift its block on the Kaesong industrial complex that lies close to its Southern border.North Korea closed the last remaining border crossing between the two antagonistic countries on Wednesday and has threatened to pull out the 53,000 North Korean workers employed by South Korean companies in the complex.Tensions are reaching boiling point on the Korean peninsula, RT reported.Meantime, North Korea loaded two intermediate-range missiles on two mobile launchers and has hidden them in an unidentified facility near the East coast, military in Seoul said.\"Early this week, the North moved two Musudan missiles on a train and placed them on mobile launchers,\" Yonhap News quoted military sources as saying on Friday.It was not clear whether the move is for a test firing or military drills.The South Korean Defense Ministry had confirmed the movement of one missile the day before, but declined to comment on the new report.