South Korean soldiers fired warning shots on Sunday after North Korean troops briefly crossed the heavily fortified border between the two countries, known as the Demilitarized Zone (DMZ). The incident occurred amidst ongoing tensions and Cold War-style activities such as balloon launches and propaganda broadcasts. While clashes at the border have occurred sporadically in the past, observers suggest that this incident is unlikely to escalate into a major confrontation, as both sides did not engage in further violence.

According to South Korea's Joint Chiefs of Staff, the breach occurred at 12:30 p.m. on Sunday when North Korean soldiers crossed the military demarcation line while carrying out unspecified work on their side of the border. After South Korean troops fired warning shots and issued broadcasts, the North Korean soldiers promptly returned to their territory. South Korea's assessment is that the intrusion was likely unintentional, as the area where the incident took place is wooded and lacks clear demarcation signs.

Reports from South Korean media suggest that approximately 20-30 North Korean soldiers entered South Korean territory about 50 meters (165 feet) after possibly losing their way. Most of them were reportedly carrying construction tools such as pickaxes. The DMZ, spanning 248 kilometers (155 miles) in length and 4 kilometers (2.5 miles) in width, is heavily fortified with mines, barbed wire fences, and combat troops on both sides, serving as a legacy of the Korean War.

In response to North Korea's recent balloon launches carrying propaganda materials, South Korea resumed its own anti-Pyongyang propaganda broadcasts via loudspeakers along the border. North Korea, in turn, has deployed its own loudspeakers but has yet to activate them. The exchange of psychological warfare tactics, including loudspeaker broadcasts and balloon campaigns, has intensified tensions between the two Koreas amid stalled negotiations over North Korea's nuclear program.