North Korean leader Kim Jong Un said an elevated US security partnership with South Korea and Japan poses a grave threat to his country and vowed to bolster his nuclear weapons program further, state media reported Sunday.

North Korea's Kim Jong Un criticizes the trilateral military cooperation between the United States, Japan and South Korea for only increasing tensions

SEOUL (Reuters) -North Korean leader Kim Jong Un criticised trilateral military cooperation among the United States, Japan and South Korea for raising tensions in the region and vowed countermeasures,

Kim Jong Un, chairman of the Workers' Party of Korea, reaffirmed on the 8th that the United States is behind the conflicts occurring not only on the Korean Peninsula but also around the world, stating that he would strengthen nuclear forces.

Kim Jong Un condemns the US for prolonging the Ukraine conflict, signalling a potential alliance with Russia against the West.- Watch Video on English Oneindia

The first tour is set to take place Feb. 12 to 18, when major celebrations are planned for the birthday of the country's late leader Kim Jong Il, one of North Korea's biggest holidays.

North Korean leader Kim Jong Un has launched a fiery attack on the U.S., accusing Washington of deliberately prolonging the Ukraine conflict to weaken Russia. Speaking at a defense ministry meeting, Kim criticized the West’s pursuit of global dominance and reaffirmed North Korea’s unwavering support for Russia.