The move fulfils Kim Jong Un's call for a constitutional amendment labeling Seoul the main enemy and follows the destruction of transport links to the South.

North Korea confirmed Thursday that its recently revised constitution defines South Korea as “a hostile state" for the first time, two days after it blew up front-line road and rail links that once connected the country with the South.

The North Korean Constitution now defines South Korea as a "hostile state," state-run media said Thursday, in the first indication of changes made during a parliamentary meeting last week.