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.”

SEOUL, South Korea — North Korea said Sunday its front-line army units are ready to launch strikes on South Korea, ramping up pressure on its rival that it said flew drones and dropped leaflets over its capital Pyongyang.

North Korea said its army units are prepared to launch strikes against South Korea if another drone carrying propaganda flyers flies into the country.