The UN Security Council on Tuesday started emergency talks on North Korea's nuclear test with world powers calling for swift action against Pyongyang.
The 15-nation council passed a resolution last month threatening "significant action" against North Korea in the event of a new nuclear test or missile launch.
The meeting was held amid near universal condemnation of the blast. Even China, the North's closest ally, summoned the North Korean ambassador in Beijing to protest.
"We certainly hope that the council will be able to send a clear message of strong condemnation," Philip Parham, Britain's deputy UN ambassador, told reporters as he entered the closed meeting at the UN headquarters.