North Korea has often unleashed crude insults against the USA and South Korean politicians in past years to criticise what it saw as insults to its leadership or hostile diplomatic and military policies.
"The presidential candidate from the Democratic Party during his recent election campaigning reeled off rhetoric slandering the supreme leadership of the DPRK", it continued.
Further details were not given by KNCA; Biden had however criticised North Korean and Russian leaders accusing Trump of embracing "tyrants like Putin and Kim Jong Un".
KCNA said the North will "never pardon anyone who dare provoke the supreme leadership of the DPRK but will certainly make them pay for it".
North Korea has labeled Joe Biden a "fool of low IQ" and an "imbecile bereft of elementary quality as a human being" after the USA presidential hopeful called North Korean leader Kim Jong Un a tyrant during a recent speech.
Biden also became a "laughing stock" by falling asleep during a 2011 speech by Obama, it said.
North Korea's ambassador to the United Nations warned the U.S. on Tuesday that its seizure of a cargo ship could have consequences on the future of relations and stalled nuclear talks. A North Korean propaganda website last week described the South Korean proposals for humanitarian aid as disrespectful and said Seoul was trying to sidestep fundamental issues with "hollow talk and boastful credit-taking".
CNN, for instance, tried hard to use North Korea's criticism of Biden to President Donald Trump's disadvantage.
The talks, a sequel to the first-ever U.S.
The vessel - a 17,061-ton, single-hull bulk carrier, one of North Korea's largest - was detained by Indonesia's maritime authorities in April 2018 and is now in the custody of the United States, according to the department and a USA official. However recent negotiations between the two leaders in Vietnam collapsed due to disagreements over the timing of sanctions relief.
It says the ship was used to illicitly ship coal from North Korea to foreign purchasers and deliver heavy machinery to the country, helping expand Pyongyang's capabilities and continuing the cycle of sanctions evasion.
North Korea, under USA and United Nations sanctions for its nuclear and missile programmes, has stepped up a campaign for the return of the ship, which Washington says it seized over accusations it was used for coal shipments in violation of the curbs.
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