The fireworks between North Korea and America doesn't seem to be ending anytime soon.

Just two days ago, US President Donald Trump while speaking at the United Nations General Assembly in New York threatened to completely destroy North Korea.

Trump had also referred to North Korean leader, Kim Jong-Un as a "rocket man on a suicide mission".

But in an unusually personal attack, the North Korean leader fired back on Friday, calling Trump a "mentally deranged" man.

He also threatened that Trump will "pay dearly" for his threat to destroy North Korea.

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This is even as North Korea’s foreign minister hinted that the regime may explode a hydrogen bomb over the Pacific Ocean – very soon.

Trump "insulted me and my country in front of the eyes of the world and made the most ferocious declaration of a war in history", Kim said, according to the official Korean Central News Agency.

"I will make the man holding the prerogative of the supreme command in the US pay dearly for his speech," which he called "unprecedented rude nonsense".

"I will surely and definitely tame the mentally deranged US dotard with fire," he fired.

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