Things seem to be falling apart in the Korea region.

The isolated, nuclear-armed North sent a chill through the international community Tuesday after its missile launch, a milestone in Pyongyang’s decades-long drive for the capability to threaten the US mainland with a nuclear strike.

US President Donald Trump had dismissed the idea of the North having a working ICBM, vowing it “won’t happen,” but experts say the missile could reach Alaska or even further towards the continental US.

The test prompted the US and the South to stage a joint missile drill aimed at countering the North’s threats after South Korean President Moon Jae-In called for a response beyond “just words”.

North Korea hit back Thursday, with its propaganda National Peace Committee for Korea criticising Moon for denouncing Pyongyang “instead of getting rejoiced over the praiseworthy event” staged by its northern neighbour, according to the KCNA news agency.

Mocking the South as “puppet military gangsters,” the KCNA report added: “It will be as easy as a piece of cake for the (North) to wipe out the puppet forces … as we are now able to destroy even the US mainland across the ocean.”

Left-leaning Moon, who has advocated dialogue with the North to bring it to negotiating table, condemned the launch and joined calls for tighter sanctions on Pyongyang.

The latest test drew also widespread condemnation and prompted the US to push for new, tougher sanctions against Pyongyang at a UN Security Council meeting held on Wednesday.