North Korea accused South Korea on Friday of sending unmanned drones over Pyongyang three times since last week , calling this move a military provocation and a violation of its sovereignty, reports "Reuters".
Drones flying at night entered Pyongyang and scattered "numerous" anti-North Korean protests in the capital last week and this week, the North's foreign ministry said in a statement carried by state news agency KCNA.
The drone incursion calls for a response, he added, while calling on the South to end its provocative actions.
"This irresponsible and dangerous provocation, which could lead to armed conflict and even war between the two countries, must be stopped immediately," the ministry said in a statement.
South Korea's military said it had not flown drones into North Korea, Yonhap news agency reported. .
"We didn't do that. I am not familiar with the situation," South Korean Defense Minister Kim Yong-hyun said during parliamentary scrutiny when asked by lawmakers about the news report.
South Korea's Joint Chiefs of Staff also echoed the sentiment, noting that it would check whether the leaflets were sent by private organizations.
Some activists in South Korea are sending balloons into North Korea carrying parcels of clothing and leaflets criticizing leader Kim Jong Un.
In response, North Korea sent balloons carrying garbage, torn clothing and human feces back across the border, hundreds of which landed in South Korea.