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 Korea blew up sections of two roads connecting with the South, Seoul's military said Tuesday, as a tense stand-off over cross-border provocations continues.