Seoul: North Korean scientists have built an advanced hydrogen bomb that can be mounted onto an inter-continental ballistic missile, state media says.
Pyongyang's official mouthpiece, the Korean Central News Agency (KCNA), said on Sunday leader Kim Jong Un was present at a factory as the nuclear weapon was loaded onto a missile.
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US revises South Korean missile treaty
US President Donald Trump agrees with South Korean leader Moon Jae-in to revise a treaty limiting the development of the South's ballistic missiles, as tensions rise over North Korea's weapons testing.
The bomb has an explosive power that is adjustable up to "hundreds" of kilotons and can be detonated at high altitudes with its indigenously produced components allowing the country to build as many nuclear weapons as it wants, KCNA reported.
The White House said US President Donald Trump had spoken with Japanese Prime Minister Shinzo Abe on Saturday to discuss the escalating threats from North Korea.
"The two leaders reaffirmed the importance of close co-operation between the United States, Japan and South Korea in the face of the growing threat from North Korea," the White House said in a statement. "President Trump noted that he looks forward to continued trilateral coordination on the margins of the United Nations General Assembly."
Trump spoke to Abe while flying back to Washington after visiting storm-ravaged Houston.
In January 2016, North Korea claimed it had successfully tested a hydrogen bomb, its fourth test of an atomic device, but Western experts doubted it had the power of a hydrogen nuclear explosion.
North Korea escalated regional tensions once again last week by firing a ballistic missile over Japan in defiance of UN resolutions and fresh sanctions imposed last month which are expected to slash its export revenues by a third.
That launch came after Pyongyang tested two intercontinental missiles in July and claimed to have a range of about 10,000km that could hit many parts of the mainland US.
Experts and officials have said North Korea could conduct its sixth nuclear test at any time, and that the reclusive country has maintained a readiness at its nuclear test site to conduct another detonation test at any time.
Reuters