North Korean leader Kim Jong Un has vowed to bolster his nuclear weapons program in response to the U.S.’s enhanced security partnership with South Korea and Japan. Last year, the U.S. expanded bilateral military exercises with South Korean and trilateral training with South Korea and Japan.

Kim Jong Un condemns US, Japan and South Korea military ties and vows nuclear countermeasures - Kim condemned the deployment of US nuclear assets and joint military exercises in the region

The North Korean leader said the partnership poses a grave threat to his country and vowed to further bolster his nuclear weapons program.

The warning came after Kim accused the US of escalating tensions on the Korean Peninsula through its alliance with South Korea and Japan. View on euronews

Leader Kim Jong Un pledged to pursue "sustained countermeasures," citing security ties between the U.S. and its regional allies.

North Korean leader Kim Jong Un has pledged to further develop the country's nuclear arsenal, citing increasing security threats from the United States, South Korea, and Japan. In a speech marking the 77th anniversary of the Korean People's Army,