Kim Jong Un, top leader of the Democratic People's Republic of Korea (DPRK), inspected a front-line army unit stationed on two southwestern islands Thursday, the official KCNA news agency reported.

The visit came after the DPRK Supreme Military Command said it would nullify the Korean War Armistice Agreement on March 11 when South Korea and the United States start joint military exercises.

The drill, which is dubbed Key Resolve and will involve 10,000 South Korean and 3,500 U.S. troops, was denounced by the KCNA as a prelude to an invasion.