FILE PHOTO: North Korean leader Kim Jong Un and his sister Kim Yo Jong attend a meeting with South Korean President Moon Jae-in at the Peace House at the truce village of Panmunjom inside the demilitarized zone separating the two Koreas, South Korea, April 27, 2018. Korea Summit Press Pool/Pool via Reuters/File Photo
The sister of North Korea’s leader has warned of retaliatory measures against South Korea that could involve the military, in the latest escalation of tensions over defectors from the North who have been sending back propaganda and food.