In this Nov. 15, 2020, file photo provided by the North Korean government, North Korean leader Kim Jong-un attends a meeting of the ruling Workers' Party Politburo in Pyongyang. AP

North Korea has stepped up virus control measures along the inter-Korean border and at sea, state media said Sunday.

The communist country is "firmly establishing a blockade wall in the areas near the border and the Military Demarcation Line and asking workers and residents to keep established system of action and immediately gain control of and respond to even the slightest abnormal situations," the Korean Central News Agency reported.

The Korean Central Broadcasting Station also reported that the country is building a "blockade wall" deep inside the border area and near the Military Demarcation Line.

"We are strengthening our self-defensive security system and military reporting system," it said.