In a background briefing for local journalists, South Korea’s military said it detected North Korea building guard posts and trenches at border sites where its dismantled guard posts once stood.

South Korea’s Defense Ministry said Monday it discovered North Korea building guard posts at border sites and deploying troops and heavy weaponry, the Yonhap News Agency reported.

South Korea’s Defense Ministry said in a statement Monday that it detected North Korea building guard posts at border sites where its dismantled guard posts once stood, and that North Korea ...