- South Korea responded by firing warning shots and scrambling fighter jets.One drone traveled as far as the northern part of Seoul, South Korea's capital, about an hour's drive from the border, a South Korean defense official said in a briefing.The South Korean military responded by firing shots at the drones, though the country's defense ministry could not confirm if any drones were shot down."This is a clear provocation, and an invasion of our airspace by North Korea," South Korean defense official Lee Seung-oh said during a briefing.In 2017, South Korea said it had recovered a crashed North Korean drone that was spying on a U.S.-built missile system being deployed in the country, according to a CNN report from that time."