US intelligence officials believe North Korea has been "deceiving" the USA, saying the Hermit Kingdom was bolstering production for nuclear weapons at "multiple secret sites" in the past few months, a report stated.
John Bolton said top USA diplomat Mike Pompeo will be discussing that plan with North Korea in the near future.
"Physically we would be able to dismantle the overwhelming bulk of their programs within a year".
The North Korean leader seems to consider the lifting of the sanctions as a pillar of "gradual concessions" by the United States, the sources said.
The Washington Post report comes on the heels of an NBC News report Friday that found USA officials believe North Korea has increased fuel production for nuclear missiles at several secret research facilities.
Trump earlier declared that "there is no longer a Nuclear Threat from North Korea", but some officials fear that Kim's latest agreement may be another set of empty promises created to secure concessions from the USA while continuing to develop nuclear weapons.
The officials, who spoke to the Post on condition of anonymity, said that the US Defense Intelligence Agency has concluded that North Korean officials are exploring ways to deceive Washington about the number of nuclear warheads and missiles they have, and the types and numbers of facilities they have, believing that the United States is not aware of the full range of their activities.
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"But there's not any. starry eyed feeling among the group doing this that we're well, well aware of what the North Koreans have done in the past", he added.
The report comes a week after US Secretary of Defense Jim Mattis suspended the Ulchi-Freedom Guardian exercises, as well as two other war games with South Korean armed forces that were scheduled to take place over the next three months.
U.S. intel agencies suspect that Pyongyang has been increasing production of nuclear fuel at multiple secret sites, NBC reported Friday.
Kim had pledged to work toward the "complete denuclearisation" in return for security guarantees from the US. "There is little indication that North Korea has halted research, development, or production of nuclear systems even as talks continue", Mount said.
North Korea expert David Albright, a former United Nations weapons inspector and president of the Institute for Science and International Security, said the assessments come at a time when "there's a worry that the Trump administration may go soft, and accept a deal that focuses on Yongbyon and forgets about these other sites".
Despite Trump's rosy post-summit declaration that the North no longer poses a nuclear threat, Washington and Pyongyang have yet to negotiate the terms under which it would relinquish the weapons that it developed over decades to deter the U.S.
Trump reiterated in an interview broadcast today that he thinks Kim is serious about denuclearization.
Watch above, via Fox News.
"He wants to understand the Russian position, but, more importantly, he wants Putin to understand our position", Bolton said.