The US envoy to the UN has urged the Security Council to take the strongest possible measures against North Korea after its latest nuclear test.
Nikki Haley told an emergency meeting of the council in New York that the time has come to exhaust all diplomatic means before it is too late.
Ms Haley said North Korean leader Kim Jong-un had shown through his actions that he is begging for war. She said war is never something the United States wants.
North Korea tested a nuclear bomb underground on Sunday. Estimates of its power range from 50 kilotons to 120 kilotons. A 50 kilotons device would be about three times the size of the bomb that struck Hiroshima in 1945.
South Korea carried out live-fire exercises on Monday, simulating an attack on the North’s nuclear test site.
She also warned the US would look at every country which did business with the North, whose main partner is China. Reports suggest the North is preparing new test missile launches.
The latest underground blast was North Korea’s sixth nuclear test, in defiance of UN resolutions that prohibit Pyongyang from pursuing nuclear and missile programs.