north kokorea's state run mea a aired video o of the explolosio wednesday. it c came with a wararning to t south saysing the destruction is only the first step. and the next step will be decided based on how seoul responds. state media also says that the north military plans to mobilize near the border. the units will be deployed to two areas where interkorean joint projects are located. the tourist area and the kaesong industrial area. the north unveililed plans for exercises that will l be conducd near the m military y demarcati line. one of south korean's top military officials is expressing deep concern over pyongyang's announcement he's warning against further provocations. >> translator: the north will be sure to pay if these measures are put in place. >> meanwhile, south korean's unification minister has offered to resign over the worsening relationship. seoul had proposed dispatching its director of national security as a special envoy, but it said leader kim jong-un's younger sister kim yo-jong turned down the offer. the e presidentialal office in l