The powerful sister of North Korean leader Kim Jong Un has accused South Korea of deliberately avoiding responsibility for the alleged flights of South Korean drones over the North’s capital.

North Korea accused South Korea on Friday of sending drones to scatter a "huge number" of anti-North leaflets over its capital Pyongyang, in what it called a political and military provocation that could lead to armed conflict.

North Korea has accused rival South Korea of flying drones to its capital to drop anti-North Korean propaganda leaflets and threatened to respond with force if such flights occur again.