North Korea on Friday accused the Central Intelligence Agency of plotting with South Korea to assassinate leader Kim Jong-Un with "biochemical substances", and pledged to immediately begin an "anti-terrorist attack".
South Korea has accused Pyongyang of assassination plots, too, most recently in February following the murder of Kim Jong Nam, allegedly at the hands of North Korean agents.
"Korean-style anti-terrorist attack will be commenced from this moment to sweep away the intelligence and plot-breeding organizations of the US imperialists and the puppet clique".
"A$3 Korean-style anti-terrorist attack will be commenced from this moment to sweep away the intelligence and plot-breeding organisations of the USA imperialists and the puppet clique", it said.
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North Korea has stationed multiple rocket launchers and artillery units on the two islands, where a shelling and rocket attack was launched on South Korea's Yeongpyeong Island in 2010.
KCNA laid out the alleged plot in great detail, saying it was hatched in 2014 when the South Korean and United States intelligence agencies recruited a North Korean working in the timber industry in eastern Russian Federation.
U.S. Secretary of State Rex Tillerson said on Wednesday that Washington was working on more sanctions against North Korea if it takes steps that merit a new response. But South Korea has in the past admitted to having plans in place to kill Kim.
The accusation comes as Pyongyang issues increasingly belligerent rhetoric in a tense standoff with the administration of US President Donald Trump over its rogue weapons programme.
So far, neither the White House nor South Korean government have responded to the claims which come amid rising tensions in the region.
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The KCNA said that Kim looked at the South Korean island at an observation post on Jangjae Islet, calling for combat readiness against its enemy.
One of the countries doing business with North Korea is China, as it supplies almost all of the regime's crude oil, diesel, and jet fuel.
Still, Trump also said this week that he would be prepared to meet with Kim if the circumstances were right.
He also threatened secondary sanctions on companies doing illicit business with North Korea.
Tensions on the Korean peninsula have been high for weeks, with North Korea poised for a potential sixth nuclear test or a test-launch of another ballistic missile in defiance of UN Security Council resolutions.
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