North Korea is slowly removing building infrastructure near the stalled Yalu River bridge project between Dandong and Sinuiju, satellite imagery shows.

Originally several groups of buildings were built on the bridge’s northern side, possibly to help facilitate with what was a major construction project.

But satellite imagery shows the buildings have been gradually dwindling in number, with only one set of three remaining.

“(They are) some buildings to prepare industrial materials like concrete,” Lee Chang-ju, a Ph.D. candidate at Fudan University, who studies the Sino-North Korea border area, told NK News.