North Korea on Tuesday blew up a four-storey building in the border city of ​​Kesong, which was built by the two countries (North and South Korea) together in 2018. The demolition of this building has dealt a huge blow to the ongoing peace restoration efforts between the two countries in the Korean peninsula. Following the action. the relationship between the two countries has deteriorated and South Korea has also increased military patrolling and surveillance in the border areas.