A large earth tremor has been detected in North Korea, raising speculation that the country has carried out its sixth nuclear test.
US seismologists said the 6.3 magnitude quake in the north-east of the country was a “possible explosion”.
It is in the area where the North has conducted previous nuclear tests.
The tremor comes hours after North Korean leader Kim Jong-un was pictured with what state media said was a new type of hydrogen bomb.
State media said the device could be loaded on to a ballistic missile. Neither claim could be independently verified.
South Korea officials said the quake took place in Kilju County, where the North’s Punggye-ri nuclear test site is situated.
Reaction among North Korea’s neighbours was swift. Japanese Prime Minister Shinzo Abe said another nuclear test would be “absolutely unacceptable”.
South Korean President Moon Jae-in convened an emergency meeting of his national security council. The joint chiefs of staff later said the …