Bangladesh, Sept. 14 -- North Korea has issued a sharp warning against upcoming joint military exercises involving the United States, South Korea, and Japan, calling them a reckless provocation that risks igniting further instability on the Korean Peninsula. The warning, delivered through Kim Yo Jong, the powerful sister of North Korean leader Kim Jong Un, underscores the growing tension in the region amid Pyongyangs deepening military ties with Russia and its hardline stance on nuclear development.

From September 15 to 19, South Korea, the United States, and Japan are set to carry out large-scale joint military drills off South Koreas Jeju Island. The exercises will integrate naval, air, and missile-defense operations, aiming to bolster...