World leaders have reacted with anger after North Korea carried out its fifth and reportedly biggest nuclear test.
The South accused the North’s leader Kim Jong-un of “maniacal recklessness”.
China “firmly opposed” the test, Japan “protested adamantly” and the US warned of “serious consequences” including “new sanctions”. The UN Security Council will meet later behind closed doors to discuss the issue.
Such nuclear tests are banned by the UN but this is Pyongyang’s second in 2016.
Kim Jong-un’s rhetoric has also become increasingly aggressive, analysts say.