North Korea appears to have started demolishing the transmission towers that South Korea built to supply electricity to the now-shuttered inter-Korean industrial complex in the North’s border city of Gaesong, after demolishing sections of the inter-Korean roads and railways. 

South Korea’s Joint Chiefs of Staff said Tuesday that several North Korean soldiers were seen climbing the now-defunct transmission towers along the Gyeongui Line and cutting some of the power lines starting Saturday. 

The transmission towers stand at intervals of several hundred meters along the western Gyeongui Line, an inter-Korean road that the North blew up on October 15, which runs from the northern side of the Military Demarcation Line to the Gaesong Industrial Complex.

There are a total of 48 steel towers between South Korea’s Munsan and the Pyonghwa Substation in the North, with 15 on the North Korean side.

These transmission facilities, built by South Korea’s Korea Electric Power Corporation, were first connected in December 2006 and started supplying electricity to the inter-Korean industrial park, but the power supply was cut off in February 2016, a month after the North’s fourth nuclear test.