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The Boston Globe

World

North Korea’s nuclear test sparks global rebukes

Bomb reportedly stronger; UN readies response

WASHINGTON — North Korea’s confirmation Tuesday that it had conducted its third, long-threatened nuclear test provoked international rebukes and elicited pledges of more punitive action from UN Security Council members.

The official KCNA news service of North Korea said the country had used a ‘‘miniaturized and lighter nuclear device with greater explosive force than previously’’ and that the test ‘‘did not pose any negative impact on the surrounding ecological environment.’’

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