A North Korean drone entered the northern end of a 3.7km (2.2 miles) radius no-fly zone around South Korea’s presidential office in Seoul when it intruded into the country’s airspace last month, South Korean military officials say.
“It [the drone] briefly flew into the northern edge of the zone, but it did not come close to key security facilities,” a military official told South Korea’s Yonhap News Agency on Thursday.
