North Korean state media said Kim Jong Un’s regime is reviewing a plan to send its army into some areas of the demilitarized zone separating the country from South Korea.

The General Staff of the Korean People’s Army said it was on high alert, according to a report Tuesday on the official Korean Central News Agency, escalating its threats aimed at forcing South Korea to halt activists from sending anti-Pyongyang leaflets across the border by balloon.

"Our army is keeping a close watch on the current situation in which the north-south relations are turning worse and worse, and getting itself fully ready for providing a sure military guarantee to any external measures to be taken by the Party and government,” the army staff was quoted as saying by KCNA.