South Korea's military said troops aired warning broadcasts and fired warning shots after approximately 10 North Korean soldiers crossed the military demarcation line in the demilitarized zone.

In June last year, North Korean troops violated the border three times, prompting South Korea to fire warning shots. The incidents occurred when the Koreas were embroiled in Cold War-style campaigns like balloon launches and propaganda broadcasts, but they didn’t develop into a major source of tensions.

South Korean troops have fired warning shots at armed North Korean soldiers who crossed the fortified border between the two countries. South Korea's military says the North Korean troops were spotted on Tuesday. The relationship between Seoul and Pyongyang is at its lowest point in years.