According to a UN report, North Korea and Iran cooperated on the development of long-range missiles last year in violation of UN resolutions. Watch: An independent panel of experts from the UN has claimed that the two countries resumed cooperation of transfer of critical parts.

Iran, North Korea collaborated last year on missile development: UN report

North Korean leader Kim Jong-un on Friday called the United States Pyongyang's ''biggest enemy'' as he threw down the diplomatic gauntlet to the incoming administration of Joe Biden.

North Korean leader Kim Jong-un calls US Pyongyang's 'biggest enemy'

North Korean leader Kim Jong-Un has said that his country's nuclear weapons are a security guarantee and “reliable, effective” deterrent that could prevent a second Korean War, state media reported Tuesday.

Kim Jong Un denies possibility of another war in North Korea; thanks 'reliable, effective' nuclear arms

North Korea leader Kim Jong-Un had recently said Pyongyang was in 'final stages' of developing a ballistic missile that could threaten US

N Korea has plutonium to make 10 nuclear weapons: South Korea