After Pompeo's third trip to Pyongyang wraps up, he will visit Japan to brief government officials on the progress of talks on the United States' "shared commitment to the final, fully verified denuclearization" of the North, according to the State Department.
The U.S. side was "working to see whether they can prepare for high-level talks between Secretary Pompeo and Kim Jong Un and others in Pyongyang that would be a specific denuclearization road map, or at least significant dismantlement steps that could fill in a roadmap", he said.
The diplomatic efforts come as American intelligence officials have stated that North Korea is still processing nuclear fuel and expanding its weapons programs.
Patrick Cronin, senior director of the Asia-Pacific Security Program at the Centre for a New American Security, said US and South Korea officials had told him Pompeo would be seeking to agree to "a specific denuclearization road map, or at least significant dismantlement steps that could fill in a road map". Korean language watermark on image as provided by source reads: "KCNA" which is the abbreviation for Korean Central News Agency. USA and North Korean officials are holding meetings on the same topic. The official was not authorized to comment publicly on the matter and requested anonymity.
"He wants to understand the Russian position, but, more importantly, he wants Putin to understand our position", Bolton said.
"We have developed a program".
Mr Bolton, who has expressed hard-line views on North Korea, said if Pyongyang has made a decision to give up its nuclear weapons program and is cooperative, then "we can move very quickly" and they can win sanctions relief and aid from South Korea and Japan.
The North Koreans should know what to expect in these meetings, Nauert added: "We've had very clear conversations with them".
The Hamhung plant produces solid-fuel ballistic missiles that could strike US military facilities anywhere in Asia.
Even if North Korea is willing to cooperate, dismantling its secretive weapons of mass destruction programs, believed to encompass dozens of sites, will be tough.
Following the historic US-North Korea summit last month in Singapore, the US president declared that there was "no nuclear threat from North Korea".
In a Sunday interview with Fox News, President Trump said North Korea is (quote) "very serious" about denuclearization. Have I been in deals, have you been in things where, people didn't work out?
North Korea has repeatedly demanded security guarantees in exchange for any denuclearization, arguing that the objective of the Kim regime's nuclear weapons program is to protect the communist dictatorship from a theoretical American attack.
"We had good meetings yesterday and. the secretary of state will be there later this week to continue those discussions", she said.
Press secretary Sarah Huckabee Sanders announced on Monday that Pompeo would travel to North Korea this week.