South Korean military, UN command launch investigation into DMZ explosion ↧ ↧ South Korean military, UN command launch investigation into DMZ exp... South Korea's military ​and the United Nations Command launched a joint ‌investigation into a landmine explosion near the Demilitarised Zone (DMZ) separating the two Koreas, Seoul's Joint Chiefs of Staff said on Sunday, ​as opposition lawmakers called for transparency about the ​origins of the device.