The United States says it is not yet ready to confirm that North Korea did indeed detonate the nuclear device but that such a test would be a provocative act heightening tensions in North East Asia.

• 美国说它来不及核实朝鲜是否真的引爆核装置，而这样的特性试验将是使东北亚局势更紧张的一种挑畔行为.