North Korea has continued to fortify its side of the border by constructing miles of roads and barbed wire fencing, an act the South’s military condemned on Monday as a violation of the two countries’ Armistice Agreement.

North Korea installed a 10-kilometer barrier above the Northern Limit Line, the maritime boundary between the two Koreas, and up to 40 miles of “tactical” roads and 55 miles of fencing, an official from the office of lawmaker Kang Dae-sik of the People Power Party told NK News on Monday, citing information received from South Korea’s Joint Chiefs of Staff earlier this