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The White House says President Donald Trump has received a letter from North Korea's Kim Jong Un, following up on the two leaders' June summit in Singapore. Critics say the summit has so far failed to deliver on promised steps toward denuclearisation by Pyongyang.
Trump tweeted early Thursday his thanks to the North Korean leader "for your nice letter - I look forward to seeing you soon!"
The White House is not addressing whether Trump and Kim may again meet.
Trump alluded to the letter in a late-night tweet thanking Kim for the return of remains of dozens of United States soldiers killed during the Korean war, which arrived in Hawaii on Wednesday.
The U.S. ambassador also expressed skepticism regarding North Korea's dismantling of the Punggye-ri nuclear test site and the missile site at Tongchang-ri.
A second meeting between Trump and Kim has not been planned at this time, according to a person familiar with the process.More news: Researchers Off Kauai Discovered a Strange New Whale/Dolphin Hybrid
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Last week, US Secretary of State Mike Pompeo told senators that Pyongyang was continuing to produce fuel for nuclear bombs.
Trump and Kim's deal in Singapore was criticized for a lack of specifics on the denuclearization process, no timetable for progress and no verification system.
More than 7,700 USA troops remain unaccounted for from the Korea War.
Air Force General John Hyten, who as commander of the U.S. Strategic Command oversees America's nuclear forces, said North Korea had clearly demonstrated its commitment to halt flight-testing missiles since none had launched since November.
The North Koreans provided enough specifics about where each suspected body was found that USA officials have matched them to specific battles fought from 1950 to 1951, although not necessarily individuals, he said.
The Washington Post on Tuesday reported that us intelligence officials suspect that North Korea is continuing to build new missiles in the same research facility that manufactured the country's ballistic missiles capable of reaching the United States.