A patrol boat from the North’s Korean People’s Navy violated the Northern Limit Line on Monday morning, South Korea’s Yonhap News Agency reported.

South Korean military authorities revealed that a North Korean patrol boat crossed south of the Northern Limit Line – the de facto maritime border between North and South Korea in the Yellow Sea – near the South Korean island of Socheong-do at around 6:55 a.m. Monday, Korean time.

The South Korean navy responded to the violation with multiple warnings before firing five rounds from a 76mm naval gun as warning shots. The North Korean patrol boat