Speaking in Tokyo after meeting with his Japanese and South Korean counterparts, Pompeo said Sunday that denuclearization will be hard and that much work remains.
Pompeo had previously offered a more optimistic view of the talks, which were held with top North Korean party official and former spy chief Kim Yong Chol.
The peace process between the United States and North Korea was in crisis Sunday after Pyongyang angrily rejected Washington's "gangster-like" demand for rapid nuclear disarmament, despite two days of intense talks.
Pompeo said the discussion had been productive.
In a statement carried by the North's official Korean Central News Agency, the foreign ministry said the outcome of Pompeo's talks with senior official Kim Yong Chol was "very concerning" because it has led to a "dangerous phase that might rattle our willingness for denuclearization that had been firm".
But earlier, in Tokyo, Pompeo said sanctions will remain in place on North Korea "until final, fully verified denuclearization as agreed to by Chairman Kim occurs".
"Their statement is typical North Korean negotiating style", Duyeon Kim, a visiting fellow at the Korean Peninsula Future Forum in Seoul, said in an email.
Less than a month after President Donald Trumptalked about opening "a new chapter" between the U.S. and North Korea, the relationship between the two nations has taken a tense and hostile, but predictable turn. Yet Pompeo himself had earlier said he envisioned that occurring in about two and a half years, by the end of Trump's term, and Nauert later said the United States wasn't putting a timeline on the process.
The statement, by an unnamed foreign ministry official, was in sharp contrast with the account given by Mr Pompeo as he left North Korea for Japan just hours before.
However, many lawmakers on both sides of the aisle defended the drills as a necessary deterrent, and say they need to prepare for a potential conflict on the peninsula.
Yesterday, Mr Pompeo appeared dismissive of these remarks, to the point of sounding slightly exasperated when questioned. State Department spokeswoman Heather Nauert said no meeting had been planned.
"In light of the once-unimaginable prosperity and partnership we have with Vietnam today", Pompeo said, "I have a message for Chairman Kim Jong Un:President Trump believes your country can replicate this path". 'If I paid attention to the press, I'd go nuts'.
The spokesman apparently rejected the United States demand and reiterated Pyongyang's call for a "phased" and "synchronous" approach, saying that it would be the shortest way to realize a nuclear-free Korean Peninsula, Yonhap news agency reported.
"Proving once again that only fools rush in, Trump forced a summit for cheap headlines", Scarborough wrote, continuing the ongoing feud between himself and president Trump.
North Korea called the outcome of the discussion "worrisome" and argued that the "cancerous issues" the USA delegation raised were the same ones that had "amplified" distrust and the risk of war with past administrations, resulting in previous talks ending in failure.
Despite the expectations, the remains were not returned and Pompeo was not granted a meeting with Kim.
China is North Korea's closest partner but had previously helped the USA exert pressure on Kim over his nuclear program.
I mentioned last week that satellite analysis showed that North Koreans were building up their nuclear research facility. NBC News and the Washington Post reported that North Korean attempts to hide nuclear work.
However, Brazil did beat Belgium in the 2002 World Cup Round of 16 en route to its fifth, and most recent, world championship. Invariably the link-man for De Bruyne at City, Fernandinho will look to quell the 27-year-old's influence at the Kazan Arena.
Kompany, goalkeeper Thibaut Courtois, Kevin de Bruyne and Eden Hazard have won the Premier League eight times between them. I just have to play football, help my team, I came to win, not for something else.
Nauert said Pompeo's discussions with North Korean officials also included repatriation of American Korean War remains. It said the US side had shown little interest, giving "certain conditions and excuses".
Tokyo closed 1.1% higher and European markets were up more than 1% in morning trading before turning negative on Friday afternoon. Trade disputes are nothing new for the two economic superpowers, and they are not confined to targeting each other.
They can file one last petition with the Supreme Court, and if it's again rejected, they can seek presidential mercy, said A.P. On July 9, 2018 SC will decide the fate of the four accused of death sentence in the Nirbhaya gang-rape case.
The wildfire is burning through drought-stricken timber and brush near California's border with OR , authorities said Friday. In the north, the fire in Siskyou County on the OR border had virtually emptied the tiny communities of Hilt and Hornbrook.
However, first he'll have to battle out last year's runner-up Carmen Cincotti , who scarfed down 60 in 2017. According to Major League Eating , Chestnut is ranked number one in the world for competitive eating.
The head of the rescue mission, Narongsak Osottanakorn, announced late on Sunday the first four children were brought out safely. Two divers were assigned to each child to help them navigate the unsafe , narrow passageways.
Authorities in northern Chiang Rai province began the risky mission to bring out the 12 boys and their coach earlier on Sunday. Expert divers worked together to rescue guide the boys out through the narrow passageways of the cave.
His daughter Maryam Nawaz has been awarded seven and her husband Captain (retd) Safdar one year imprisonment in the case. The case is connection with several high-profile properties brought by the Sharif family in London in mid-1990s.
Trump teases pick for Supreme Court
The person spoke on condition of anonymity because the person was not authorized to discuss the conversation publicly. Dianne Feinstein, D-Calif., questioned Barrett about whether her Catholic faith might color her work on the bench.
Tropical Storm Beryl Forms in East Atlantic
A faster westward to west-northwestward motion is expected to begin over the weekend and continue through early next week. A tropical wave heading for the Caribbean is now a tropical depression and is headed for the Lesser Antilles.
Radio and television personality Ed Schultz dies at 64
Schultz is a graduate of Minnesota State University Moorhead, where as a football quarterback he was named an All-American. This announcement comes as a shock to all of us here at RT America", said the channel's official statement.
Key Trump ally Scott Pruitt forced to resign
When he started looking into Trump's policies, Wheeler said, "I was fully on board". "I am still not interested in that". That process could take several months - and potentially drag out past this November's midterm elections.
Roger Federer vs Jan-Lennard Struff, Wimbledon 2018
Third seed Marin Cilic let a two-set lead slip as he was knocked out in the second round of Wimbledon by Argentina's Guido Pella. Serena Williams , the seven-time Wimbledon victor , is seeded 25th after her tentative return from the birth of her first child.