УНН News of the World ✎ Pyongyang accused Seoul of fabricating the landmine incident and threatened self-defense. A howitzer and North Korean troops were spotted near the bor…. Photo: YonhapTensions between North and South Korea escalated this week after Pyongyang sent a letter to the UN Security Council reiterating its accusations that Seoul fabricated the September landmine incident, and after a North Korean howitzer was spotted near the border.