Kim Jong-Un mocks Trump, calls him mentally deranged: KCNA

North Korean leader Kim Jong-Un on Friday called Donald Trump as "mentally deranged" and warned he will make the US president "pay dearly" for threatening his nation, reports state news agency KCNA.

Earlier on Thursday, US President Donald Trump signed an executive order to target North Korea’s trading partners that “finance and facilitate trade” with the reclusive nation.

Trump signed the executive order two days after he warned North Korea of “total destruction” if its leader Kim Jong-Un, whom he mockingly described as a “Rocket Man”, continued with his provocative behaviour.

Trump said he has signed an executive order that gives the US Treasury new authority to “target” businesses and entities that “finance and facilitate trade with North Korea” and send goods, services and technology to North Korea.

“It is unacceptable that others financial support North Korea,” Trump said in a brief interaction with reporters at a luncheon with leaders from South Korea and Japan.

He praised the “very bold move” taken by China’s central bank to stop financial transactions with North Korea.

He said the US’ goal is “complete denuclearisation” of North Korea.