North Korea has threatened the US that it faces its "greatest disaster"

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The hermit kingdom’s state media released a “severe warning” to the US after its “perfect” nuclear test.

The article in the North Korean state newspaper Rodong Sinmun said: "If the US persists in its hostile policy towards the DPRK and makes a showdown with the latter to the end, while denying the strategic position of the DPRK, it will only face the final miserable end.”

It also said that the recent missile strike over Japan was a “great demonstration of the invincible might” of North Korea.

Meanwhile Kim Jong-un's other mouthpiece, the Korean Central News Agency said: “If the US imperialists awkwardly provoke the DPRK, they would not be able to escape from the greatest disaster.