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Kim Jong-un is believed to have built and be operating a planet to produce a key ingredient for an H-bomb.

Hydrogen devices are much more powerful than conventional nukes – and their development in the 1950s took the Cold War between Russia and the US to the next level.

Scientists analysing Pyongyang’s nuclear power made the shocking revelation as the US floods troops and warships into the Korean Peninsula.

Yesterday, Washington admitted war was now “on the table” with North Korea.

(Image: GETTY)

The Institute for Science and International Security said Kim Jong-un’s H-bomb factory appears to be on the east coast of North Korea.

The rogue state has been buying up large quantities of mercury and lithium hydroxide from its only ally China.

These materials are used to produce Lithium 6 – the key ingredient in an H-bomb.

Previously, the UN warned of North Korea’s hydrogen bomb capability ahead of the war games between US and South Korea.

(Image: GETTY) (Image: GETTY)

The institute said: “These findings add credibility to North Korea’s claims that it has been developing thermonuclear or boosted fission weapons, albeit likely crude ones that may still not work.

"But with more nuclear testing and time, North Korea is likely to succeed.”

They added: "Lithium 6 is a critical raw material needed for the production of single-stage thermonuclear and boosted fission weapons.”

Pyongyang’s next nuclear test is feared to be “14 times” larger than previous ones – with a top defector warning it could trigger “apocalypse” in North Korea.

North Korea has sparked international fury by launching four missiles into the Sea of Japan, not long after the alleged assassination of Kim's brother Kim Jong-nam.

Tensions have reached an all-time high with North Korea as Kim Jong-un’s diplomat warned of an “actual war” while speaking at the UN.

Kim’s nuclear bomb test site is also being prepared for another test, according to satellite images shared by Pyongyang watchdog 38 North.