US diplomats have worked out a new draft of a United Nations resolution imposing sanctions on North Korea in response to its claimed nuclear test. US envoy John Bolton said he hoped the new draft, which the US will formally introduce on Thursday, would pass by the end of the week, BBC reported. The document calls for punitive sanctions targeting Pyongyang's missile and nuclear programmes. But divisions remain among key nations, with China unhappy with the draft. The underground test reportedly took place at 1036 (0136 GMT) on Monday in Gilju in Hamgyong province. Russia is the only country to have confirmed that it was a nuclear explosion.