RUSSIA has warned North Korea risks plunging the entire region into a catastrophic war that threatens to shatter global peace and security if an immediate halt is not called to the nation's rapidly expanding nuclear weapons programme.
The Kremlin made the alarming prediction after Pyongyang successfully carried out its most powerful nuclear device on Friday - more devastating than the warhead dropped on Hiroshima that ultimately ended the Second World War.
Russia's foreign ministry called on the North to end its "dangerous escapades" and warned the test would have negative consequences for the increasingly isolated pariah state.
South Korean president, Park Geun-hye, blasted the "maniacal recklessness" of her northern neighbour while America warned of "serious consequences" following the unprecedented blast.
The European Union's foreign policy chief also warned that the test threatened peace across Asia.
Federica Mogherini said the development was a "grave threat to peace and security of the entire region and beyond".
And NATO Secretary General Jens Stoltenberg described the latest test as "very disturbing"
But China has blamed the US and South Koreas for ratcheting up tensions.
China is Pyongyang's main ally and simply said it would lodge a diplomatic protest with North Korea at its embassy in Beijing.
Beijing's official Xinhua news agency accused Seoul of having "seriously damaged regional strategic balance and caused a rise in tensions on the peninsula" with the deployment of an air defence shield backed by the US.
n another worrying turn, nuclear experts now believe Kim Jong-un's military is capable of striking anywhere in South Korea and Japan after the North's technicians claimed to have miniaturised the warhead sufficiently to fit it on a ballots missile.
North Korea's KNCA news agency said the country was now able to "produce at will and as many as it wants a variety of smaller, lighter and diversified nuclear warheads of higher strike power".
Today's test triggered a 5.3 magnitude tremor was reported by the United States Geological Survey.
The earthquake took place 15 miles north east of Sungjibaegam and was only 11 miles below the surface.
Pyongyang has carried out a series of nuclear and ballistic missile attempts since the turn of the year with mixed results - causing tough new sanctions to be imposed by the UN Security council.
Security experts last month hinted that North Korea's nuclear capability had dramatically expanded in 2016.