KCNA further alleged that a North Korean, identified only by the surname "Kim", had been "corrupted and bribed" by South Korean intelligence services while he was working in Russian Federation. North Korea regularly lashes out at the USA and South Korea, though the allegations lodged Friday were more specific than usual.
"They hatched a plot of letting human scum Kim commit bomb terrorism targeting the supreme leadership during events at the Kumsusan Palace of the Sun and at a military parade and public procession after his return home", KCNA said.
Neither the Central Intelligence Agency nor the NIS has commented on the claims.
The ministry refers to two payments to "Kim" of $US20,000 and a further two of $100,000 for "bribery" and obtaining equipment.
This comes amid high tensions in the region. The Kim regime has been testing ballistic missiles in recent days, while the USA began installing a defense system in South Korea that would ideally destroy missiles launched from the North before they hit their intended target.
"Korean-style anti-terrorist attack will be commenced from this moment to sweep away the intelligence and plot-breeding organisations of the US imperialists and the puppet clique", the statement says.
Scott Snyder, a senior expert on Korea at the Council on Foreign Relations, made the point in an article on the think tank's website, noting that many Chinese and American experts expect there would be limits in China pressuring the North.
They allegedly smeared the man's face with the toxic VX nerve agent, a chemical described by the United Nations as a weapon of mass destruction, at Kuala Lumpur airport on February 13.
On Saturday, North Korea conducted its second failed ballistic missile test in two weeks.
"By relentlessly bringing in a number of strategic nuclear assets to the Korean peninsula, the U.S.is gravely threatening the peace and safety and driving the situation to the brink of a nuclear war", North Korean officials said in a statement in April, according to KCNA.
Analysts concur that a possible suspension of China's oil exports would have a major impact on North Korea, but they are more inclined to believe that China would not use its biggest punitive measure as leverage over North Korea-a total oil embargo-if Pyongyang is carrying out low-intensity provocations. The White House quickly clarified that conditions were "clearly not there right now" and said the North should "end its provocative behaviour immediately".