North Korea has threatened to pull out of a summit with President Donald Trump if the US insists it gives up its nuclear weapons.

The highly anticipated meeting between President Trump and North Korean leader Kim Jong-un is due to take place on June 12.

However, in an angry statement, North Korea’s vice-foreign minister accused the US of making reckless statements and of harboring sinister intentions.

Kim Kye-gwan pointed the finger squarely at US National Security Adviser John Bolton.

He said: “We do not hide our feeling of repugnance towards him.”

The groundbreaking agreement for Kim Jong-un and Donald Trump to meet came about as North Korea said it was committed to denuclearizing the Korean peninsula.

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Exactly what that would entail has remained unclear, but North Korea has invited foreign media to witness the dismantling of its main nuclear test site later this month.

John Bolton recently said North Korea could follow a “Libya model” of verifiable denuclearization, but this alarms Pyongyang, which watched Libya’s Colonel Gaddafi give up his nuclear program only for him to be killed by Western-backed rebels a few years later.

Kim Kye-gwan’s statement, carried by North Korea’s state media, said that if the US “corners us and unilaterally demands we give up nuclear weapons we will no longer have an interest in talks” and “will have to reconsider” attending the June 12 summit in Singapore.

The official said North Korea did have “high hopes” but that it was “very unfortunate that the US is provoking us ahead of the summit by spitting out ludicrous statements”.

He is known to be highly respected in the North Korean leadership and has taken part in negotiations with the US before. There is very little chance Kim Kye-gwan;s comments were not personally endorsed by Kim Jong-un.

Hours before the announcement, in a sign of growing problems, Pyongyang has also pulled out of a meeting scheduled with South Korea on May 16 because of anger over the start of US-South Korean joint military drills.

Pyonyang had earlier said it would allow them to go ahead, but then called them “a provocative military ruckus” which was undermining its diplomatic efforts.

The sudden change in tone from North Korea is said to have taken US officials by surprise. Analysts said Pyongyang could be trying to strengthen its hand before talks.

The US state department said it was continuing to plan the Trump-Kim meeting, and President Trump is yet to comment.