Kim's latest threat, a doubling-down on an earlier promise to "exponentially" ramp up nuke production, came as a US Navy carrier strike group arrived in South Korea on Tuesday.
U.S. President Joe Biden will meet leaders of NATO's eastern flank on Wednesday to show support for their security after Moscow suspended a landmark nuclear arms control treaty.
North Korea has said it successfully tested a recently developed solid-fuel engine, claiming the trial would pave the way to a “new strategic weapon system” after its military outlined plans to produce an upgraded intercontinental ballistic missile (ICBM).
Iran said on Monday that it will not accept the resumption of nuclear negotiations with the West under pressure or threat. Indirect talks between Iran, US on reviving nuclear deal remain stalled since August
China's nuclear arsenal is likely to more than triple to 1,500 warheads by 2035, the Pentagon said in a Tuesday report that also highlighted the increasing sophistication of the country's air force.