North Korea nuclear tests and rocket launches

North Korea conducted its fifth and biggest nuclear test on Friday and said it had mastered the ability to mount a warhead on a ballistic missile, ratcheting up a threat that its rivals and the United Nations have been powerless to contain.

The blast, on the 68th anniversary of North Korea's founding, was more powerful than the bomb dropped on Hiroshima, according to some estimates. It was condemned by the United States, which said it would work with partners to impose new sanctions on North Korea, and by China, Pyongyang's main ally.

The United Nations Security Council would discuss the test and whether the 15-member body should punish the reclusive state by imposing further sanctions at a closed-door meeting on Friday requested by the United States, Japan and South Korea, diplomats said. (Reuters)

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