The statement comes after a report by Japan's Asahi Shimbun newspaper cited an unidentified person connected to South Korea's intelligence services, who said North Korea began tests to load the bio-agent anthrax on to its intercontinental ballistic missiles.
Trump's National Security Adviser H.R. McMaster said earlier this month that North Korea was the "greatest immediate threat to the US" In reaction to North Korea missile tests and threats, the US has engaged in a major joint military exercise this month with the South Korean army that involved more than 12,000 personnel.
Another report by the U.S.' National Security Strategy published Monday stated that biological weapons being developed by North Korea could be delivered by missiles, triggering fears of a potential biological war.
The Asahi newspaper report said the USA government is aware of the tests, which were meant to ascertain whether the anthrax bacteria could survive the high temperatures that occur when warheads re-enter from space.
The United States also has come to the same conclusion.
In response, North Korea said it would "take revenge" on the US for saying it is developing biological weapons. USA troops stationed in South Korea have been vaccinated against anthrax for over a decade, according to the newspaper.
The North Korean regime has started tests with a view to loading intercontinental ballistic missiles (ICBMs) with anthrax, according to regional media reports.
Virginia woman mauled to death by her pet pit bulls
Agnew also revealed the captured animals being euthanized, after having received the family's consent on Saturday. A woman was mauled to death by her own pitbulls in an "absolutely grisly " attack in the United States.
A spokesperson for South Korean President Moon Jae-in said the proposed delay was "confined to our efforts to host a peaceful Olympics".
North Korea's state-run Central News Agency vehemently denied the claims, saying, 'Properly speaking, it is the USA stereotyped method to cook up untruths as truths, stubbornly insisting that black is white and fabricating anything for satisfying their aggressive greed.
The DPRK is the abbreviation for North Korea's official name, the Democratic People's Republic of Korea.
"It is the USA that conducts military aggressions and cruise missile attacks on sovereign states in broad daylight while faking "possession of WMD" and "use of chemical weapons" of those countries", said the statement.
North Korea's leader has repeatedly infuriated world leaders by carrying out a variety of illegal nuclear tests.
It recollected when United States troops openly used biological weapons during the Korean War and inflicted needless suffering on innocent civilians. He was believed in some quarters to still be China's favored ruler of North Korea.