North Korea has condemned the recent agreement between South Korea and the United States to develop nuclear-powered submarines, warning that it could trigger a “nuclear domino” effect in the region. The North’s state media criticized the deal, suggesting it would escalate tensions and provoke an arms race in East Asia. Additionally, China has expressed caution regarding the implications of this Washington-Seoul collaboration on nuclear submarine technology, reflecting concerns about regional stability. This development underscores the delicate balance of power in Northeast Asia and highlights the strategic considerations surrounding nuclear capabilities, which could significantly impact security dynamics in the region.