(BBC) — North Korean military ambitions are a "serious threat" to the US, outgoing Pentagon chief Leon Panetta has said.
In a speech made after Pyongyang carried out its third nuclear test, Mr Panetta likened the North to Iran, describing them as "rogue states."
In New York, the UN Security Council "strongly condemned" the nuclear test.
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The council said it would begin work on measures against North Korea, after UN chief Ban Ki-moon said the test was a "clear and grave violation."