South Korea's military has conducted a joint on-site investigation with the U.N. Command (UNC) into the cause of a suspected mine blast inside the Demilitarized Zone (DMZ) last week, with further probes planned, officials said Sunday. A survey team comprising some 40 personnel reached the vicinity of the suspected explosion site inside the DMZ but failed to reach the actual site of the incident, the Joint Chiefs of Staff (JCS) said in a text message sent to reporters. The joint probe comes just six days after the explosion occurred south of the Military Demarcation Line (MDL) separating the two Koreas, leaving two officers seriously injured. The survey team — comprising South Korean troops, the UNC's Military Armistice Commission and relevant investigative agencies — inspected the area using mine detectors and conducted route-clearance operations in the DMZ from around 9 a.m. until sundown, according to the JCS. However, the team decided to resume the operation at a later date, citing the high risk posed by the possibility of unidentified land mines in the area and the extreme fatigu