North Korea has pulled out of a liaison office with Seoul just north of their militarized border. The move is seen as a setback, in the wake of a failed summit between the North and the United States, for South Korean President Moon Jae-in’s effort to end hostility, Reuters said. North Korea conveyed the decision during a weekly meeting with the South on Friday morning saying it was on “instructions from a higher level,” Vice Unification Minister Chun Hae-sung said in Seoul.