A North Korean fishing boat crossed the de-facto maritime border near Yeonpyeong Island in the West Sea on Tuesday morning but retreated after a South Korean patrol boat fired warning shots.
The fishing boat "crossed about 900 m into South Korean waters," a spokesman for the Joint Chiefs of Staff here said. "A South Korean speedboat reached the scene immediately and sent warning messages four times. When the fishing boat didn't respond, the speedboat fired two warning shots from a 76 mm gun."
The fishing boat then returned to the North across the Northern Limit Line.