Seoul, September 22: North Korea could test a powerful nuclear weapon in the Pacific ocean, said the country’s foreign minister in response to US President Donald Trump’s threats of military action. North Korean leader Kim Jong-Un mocked Trump as “mentally deranged” — and warned that he will make the US president “pay dearly” for threatening the destruction of his country at the United Nations.

Ahead of his address at the United Nation General Assembly, Ri Yong-ho said in New York, “It could be the most powerful detonation of an Hydrogen-bomb in the Pacific. We have no idea about what actions could be taken as it will be ordered by leader Kim Jong-un.” Also read: Can North Korean Hydrogen Bomb Evaporate New York in Case of Surface Blast?

Kim lashed out after Trump stunned the world on Tuesday when he used his maiden UNGA speech to warn the North Korea that Washington would “totally destroy” it if the US or its allies were attacked. The remarks came after months of escalating tensions over advances in the rogue weapons programme operated by Pyongyang, which has defied tough sanctions to launch its sixth and largest nuclear test and to fire a series of missiles over Japan.

“I will make the man holding the prerogative of the supreme command in the US pay dearly for his speech calling for totally destroying the DPRK,” Kim was quoted as saying by state news agency KCNA.

Kim also questioned the sanity Trump and said, “The mentally deranged behaviour of the US President openly expressing on the UN arena the unethical will to ‘totally destroy’ a sovereign state… makes even those with normal thinking faculty think about discretion and composure.”

Isolated and impoverished, the North Korea said it needs a nuclear deterrent to protect it from an aggressive US and the autocratic regime has made militarism a central part of its national ideology. Trump’s remarks “have convinced me, rather than frightening or stopping me, that the path I chose is correct and that it is the one I have to follow to the last” Kim added.

On September 3, North Korea detonated a hydrogen bomb with “perfect success”, its state media had said, adding that the device was capable of being loaded onto its long-range missiles. An artificial 6.3 magnitude earthquake was detected in the country’s northeast, not far from the Punggye-ri nuclear test site.

With inputs from Agencies