evidence: South Korea’s military has said it fired warning shots after soldiers from North Korea briefly crossed the border at the Demilitarized Zone (DMZ) that separates the countries. The incident took place at about 12.30pm (03:30 GMT) on Sunday when a group of North Korean soldiers crossed over the Military Demarcation Line within the DMZ, the Yonhap news agency reported, citing a statement from the Joint Chiefs of Staff (JCS). [...] North Korea is extremely sensitive to Seoul’s loudspeaker broadcasts because it fears such messaging could demoralise front-line troops and residents and eventually weaken Kim Jong Un’s grip on power, analysts say.