US Secretary of State Rex Tillerson urged his South East Asian colleagues on Thursday to take further steps to isolate North Korea's pariah regime.
North Korea on Friday accused the governments of the United States and South Korea of carrying out an unsuccessful assassination attempt against leader Kim Jong Un.
KCNA laid out the alleged plot in great detail, saying it was hatched in 2014 when the South Korean and U.S. intelligence agencies recruited a North Korean working in the timber industry in eastern Russian Federation.
North Korea conducted an annual military parade, featuring a display of missiles and overseen by top leader Kim Jong Un and his right-hand men on April 15 and then a large, live-fire artillery drill 10 days later.
Tension on the Korean peninsula has been high for weeks, driven by concern that North Korea might conduct its sixth nuclear test or test-launch another ballistic missile in defiance of U.N. Security Council resolutions. The CIA declined to comment and South Korea has issued no statement so far.
Giving details of the failed assassination plot, the statement said that the killer was told that the use of biochemical substances "including radioactive substance and nano poisonous substance is the best method that does not require access to the target".
Pompeo's visit to South Korea included "detailed security discussions" with Seoul intelligence officials and a visit to an island near the border with the North, according to the US military command in Korea. Both Malaysia and South Korea have blamed the North for the assassination, which retorts that the accusations are an attempt to smear it.
North Korea accuses US, South Korea of assassination attempt
Geng, however, also said China was "firmly committed" to the denuclearisation of the Korean peninsula through dialogue and consultation.
Further details mentioned in the report about the "terrorist" indicate that the individual's last name is also Kim and that the interaction with the Central Intelligence Agency and NIS occurred in June 2014.
North Korea warned of an impending cataclysm should relations between the two countries reach a boiling point.
"We will ferret out and mercilessly destroy to the last one the terrorists of the U.S. CIA", it reads.
Although the North Korean suspect was not named in the official televised broadcast, he was identified by his surname - Kim. It even offered to send North Korean relatives to the South to reunite with the workers, although Seoul rejected the highly unusual overture.
North Korea alleged a bribe paid to a North Korean citizen was used to train him as a terrorist as well as other "accomplices", The Post reported.
Sen. Cory Gardner, R-Colo., chairman of the Senate Foreign Relations subcommittee on East Asia, said last month that the United States should work with South Korea, Japan and China to formulate a plan for what would happen after the fall of Kim.
He said the claim was more likely a North Korean response to "escalating threats" from the US side.