International scepticism and condemnation have greeted North Korea’s claim to have successfully carried out an underground hydrogen bomb test.

If confirmed, it would be North Korea’s fourth nuclear test since 2006 and mark a major upgrade in its capabilities.

But, according to BBC News, nuclear experts have questioned whether the size of the blast was large enough to have been from a hydrogen-bomb, which is more powerful and technologically advanced than atomic weapons.

South Korea said it found it difficult to believe North Korea could test a hydrogen bomb, but hastily convened an emergency meeting.

The United Nations Security Council will also hold a meeting later today, at the behest of the United States and Japan.



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