"The Nuclear Weapon Institute and other concerned institutions are taking technical measures for dismantling the northern nuclear test ground of the DPRK in order to ensure transparency of discontinuance of the nuclear test", said the announcement.
The North's foreign ministry issued a press release, carried by the state-run Korean Central News Agency (KCNA), detailing the country's plans to shut down its Pyunggye-ri nuclear test ground.
North Korean leader Kim Jong Un has taken a series of steps this year to ease tensions with the U.S. and he is set to meet U.S. President Donald Trump for historic talks next month in Singapore.
Pyongyang has scheduled the dismantlement of its nuclear test site for sometime between May 23 and 25 depending on the weather.
The isolated Asian nation, which had already pledged to begin dismantling the site this month, will invite journalists from China, Russia, the US, the United Kingdom and South Korea to cover the event, KCNA said in the statement.
"In parallel with dismantlement of the nuclear test ground, guards and researchers will be withdrawn and the surrounding area of the test ground be completely closed", it added.
All global journalists will be provided with a charter flight into Wonsan, a port city in eastern North Korea, from Beijing, KCNA said.
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The tunnels of the test site would be blown up and their entrances completely blocked, the ministry statement said.
Three US prisoners were returned to Washington by Pyongyang last week, with Trump saying the "denuclearisation of North Korea would be his proudest achievement".
Kim also offered to make the dismantling public.
"The North will shut down a nuclear test site in the country's northern side to prove the vow to suspend nuclear test".
The summit will be the first meeting ever between a sitting USA president and the leader of North Korea.
North Korea has declared its nuclear forces complete late previous year after its most powerful nuclear test to date in September and the launches of intercontinental ballistic missiles that experts say are capable of hitting most, if not all, of the continental United States.
In June 2008, worldwide broadcasters were allowed to air the demolishing of a cooling tower at the Nyongbyon reactor site, a year after the North reached an agreement with the USA and four other nations to disable its nuclear facilities in return for an aid package worth about $400 million. However, a final attempt by Bush to complete an agreement to fully dismantle North Korea's nuclear weapons program collapsed that December when the North refused to accept USA -proposed verification methods.