South Korean soldiers fire warning shots after North Korean troops cross border, apparently in error. South Korean troops fired warning shots to repel North Korean soldiers who crossed the Demilitarized Zone (DMZ) border for the second time this month. About 20-30 North Korean soldiers, possibly unaware of the border due to dense vegetation, retreated after South Korea's warnings. The incident, amid rising tensions and recent psychological warfare, follows a similar incursion on June 11. The DMZ, a heavily fortified area, remains a site of occasional confrontations.