The North Korean leader called for restructuring the army’s training system and reinforcing front-line units along the southern border, as Pyongyang deepens its push to redefine the security landscape of the Korean Peninsula.

The plans come at a low point in relations with South Korea and Pyongyang unresponsive to Seoul's repeated offers for dialogue.

North Korean leader Kim Jong Un called for strengthening frontline forces along the border with South Korea to create an "impregnable fortress," state media reported Monday.