SEOUL, South Korea -- 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 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 Korean leader Kim Jong Un reminded his troops to treat South Korea as a hostile foreign enemy and insisted that the North wouldn’t hesitate to attack its rival if the South infringes upon its sovereignty,