In a move escalating tensions on the Korean Peninsula, North Korea announced on Friday that it had successfully tested an “underwater nuclear weapon system” in response to joint naval exercises involving the United States, South Korea, and Japan. The drills, which included the deployment of a U.S. nuclear-powered aircraft carrier, were deemed by Pyongyang as a severe threat to its security.
The North Korean defense ministry, as reported by the state news agency KCNA, stated that the tests were conducted in the East Sea of Korea and involved the “Haeil-5-23,” an underwater nuclear weapon system under development. This latest development comes on the heels of similar tests last year, where Pyongyang claimed to have experimented with an underwater nuclear attack drone capable of unleashing a “radioactive tsunami.”
Analysts have raised questions about the authenticity and capabilities of North Korea’s purported underwater nuclear weapons, casting doubt on the country’s claims. The international community remains wary, especially given the lack of transparency surrounding North Korea’s military advancements.
The recent joint naval exercises, carried out earlier this week off southern Jeju Island, involved South Korea, the United States, and Japan in response to North Korea’s launch of a hypersonic missile. The exercises included nine warships, including the U.S. aircraft carrier USS Carl Vinson.
Pyongyang criticized the drills, characterizing them as a threat to regional stability and accusing the participating countries of jeopardizing its security. The defense ministry spokesman stated that North Korea’s response through the underwater nuclear weapon test aims to enhance its “underwater nuke-based countering posture” and deter perceived hostile actions by the navies of the U.S. and its allies.
The announcement follows a period of heightened tensions between North and South Korea, marked by the deterioration of key agreements and increased military activities along the border. North Korean leader Kim Jong Un recently declared South Korea as his country’s “principal enemy,” indicating a significant shift in relations.
Analysts, such as Hong Min from the Korea Institute for National Unification, interpret the underwater test as a clear sign of deploying Haeil drones to North Korea’s navy fleets. He emphasized that Pyongyang’s statement underscores its stance of responding proportionally to military exercises by South Korea, Japan, and the United States, without explicitly crossing into provocations for armed conflict.
Ahn Chan-il, a defector-turned-researcher at the World Institute for North Korea Studies, expressed skepticism about the exact capabilities of North Korea’s underwater nuclear weapons system. He highlighted that, given North Korea’s defense science level and the developmental stage of the weapon, it does not yet pose a significant threat.
The international community continues to monitor the situation closely, emphasizing the importance of de-escalation and diplomatic solutions to avoid further instability in the region. North Korea’s recent military activities, including the hypersonic missile launch and the purported underwater nuclear weapon test, raise concerns about the potential for further provocations in the coming months.