The head of the South Korean government agency for defense research and development said Tuesday the uncrewed aerial vehicles seen in footage released by North Korean state media do not seem to be South Korean.

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 accused South Korea of flying propaganda-filled drones over Pyongyang and threatened “retaliation,” state media reported Friday.

North Korea accused South Korea of infiltrating Pyongyang with drones, officials are reported to have said "All means of attack are ready to act."

North Korea briefly ordered its troops along the South Korean border to stand ready to fire after accusing Seoul of sending drones into its capital Pyongyang in what it called a “war provocation.” Most Read from BloombergDubai’s Allure to Expats Is Weighing on City’s InfrastructureThe Master Plan That Shaped Pakistan’s Capital Is No Longer WorkingThe Cablebus Transformed Commutes in Mexico City’s Populous OutskirtsAs Brussels Booms,

North Korea has placed its artillery on full alert near the border and reinforced air defense systems in Pyongyang in response to potential South Korean drone incursions into the capital, according to Yonhap via Ukrinform.