North Korean leader Kim Jong Un has held a security meeting following what Pyongyang says were incursions by South Korean drones across the border, its state media reported on Tuesday admid a pickup in tensions between the two countries.

North Korean leader Kim Jong Un convened a top national security meeting to direct a plan of "immediate military action" in a dispute with the South over drone flights, state

The sister of North Korea's leader, Kim Yo-jong, accused South Korea on Tuesday of violating Pyongyang's airspace with drones. She stated that Pyongyang has "clear evidence" of the South Korean military's guilt and threatened to "turn South Korea to ashes" if drones appear again.