Recently, South Korea’s Defense Intelligence Agency said North Korea “could carry out a nuclear test within a short period of ...

North Korea appeared to destroy at least three nuclear tunnels, observation buildings, a metal foundry and living quarters at its Punggye-ri nuclear test site on Thursday, in a process observed by ...

SEOUL, South Korea — North Korea has put up a cover over the entrance of a tunnel at its main underground nuclear test site to foil U.S. intelligence efforts to determine whether a detonation there is ...

North Korea has hurtled along its path of nuclear tests and trials of delivery systems, despite years of sanctions.

South Korean and American troops practised storming North Korea’s network of strategic and fortified underground tunnels with four-legged robot dogs and drones during military drills to train for ...

WASHINGTON (AP) – Satellite photos show signs of new tunnel work at North Korea’s underground nuclear test site, a U.S. research institute said Tuesday. The U.S.-Korea Institute at Johns Hopkins ...

Potential expansion appears in line with leader Kim Jong Un’s directive for ‘exponential growth’ of nuclear weapons ...

South Korea's recent joint military drills with the United States are aimed at deterring North Korea, the North's state media ...