In a statement carried by state media, North Korea's Foreign Ministry said all of the tunnels at the country's northeastern testing ground will be destroyed by explosion, and observation and research facilities and ground-based guard units will also be removed.
Satellite images show that North Korea has begun dismantling its nuclear-test site, razing several key buildings and removing rails weeks ahead of its summit with the United States, according to a monitoring website.
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The South Korean government, which had expected North Korea to invite nuclear experts and global watchdogs for the shutdown process, said it remains to be seen whether Pyongyang maintains its stance. These breakthroughs reflect the effectiveness of diplomacy, when it is done right.
Kim's latest diplomatic overture has seen him hold a summit with the South's President Moon Jae-in and travel twice in less than two months to meet with Chinese leader Xi Jinping. Kim has denied such views, saying the site has two additional underground tunnels that could be used for new tests.
Some in the worldwide community believe Kim's commitment to close Punggye-ri is a welcome development.
The North has been vowing to pursue nuclear development unless Washington removes its 28,500 troops from South Korea and the nuclear umbrella defending South Korea and Japan.
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If North Korea eventually decides to exclude expert groups, the decision would show Pyongyang's willingness to complete the process of dismantling the nuclear site in a "prompt" manner, Seoul's presidential office said, on the apparent logic that expert verification could delay the process.
North Korea has announced that they will dismantle Nuclear Test Site this month, ahead of the big Summit Meeting on June 12th.
Bolton said the USA side also will discuss not just North Korea's nuclear and missile programmes but its chemical and biological weapons arsenal as well.
A number of analysts have doubted North Korea's commitment to the denuclearisation, citing the example of 2008, when Pyongyang publicly dismantled parts of its uranium reprocessing plant but kept developing its nuclear programme.
The Foreign Ministry explained that journalists from Russia, UK, China, the Republic of Korea and the United States will be invited to the ceremony. While this gesture of regime is taken as a sign of goodwill to negotiations, North Korean leader has ensured that his country's nuclear force "is complete", and refore no longer needs this nuclear silo.
They also agreed to stop all hostile acts over "land, sea and air" and to resume family reunions on August 15.