LONDON — President Trump said Thursday that he was making “great progress” in denuclearization talks with North Korea, citing what he called a “very nice note” he received last week from Kim Jong-un, the North Korean leader, though it made no mention of nuclear weapons.
In a letter that Mr. Trump posted on Twitter along with an English translation, Mr. Kim called his summit meeting with the president in Singapore last month “the start of a meaningful journey,” and raised the idea of another such encounter.
“I extend my conviction that the epochal progress in promoting the DPRK-U.S. relations will bring our next meeting forward,” he wrote, using the initials for the Democratic People’s Republic of Korea, North Korea’s official name.
The tone of the letter was starkly at odds with that of North Korean officials last week in the wake of a visit to Pyongyang, the North’s capital, by Secretary of State Mike Pompeo.
Mr. Pompeo has toiled, so far unsuccessfully, to hammer out details of the agreement in principle struck by Mr. Trump and Mr. Kim to rid the Korean Peninsula of nuclear weapons. After his visit, the North said Mr. Pompeo had engaged in “gangster-like” tactics and made unilateral demands.
And on Thursday, North Korean officials did not show up for a meeting with Americans at the inter-Korean border to discuss the return of remains of United States soldiers killed in the Korean War, officials said.
Mr. Pompeo addressed the negotiations with Pyongyang on Thursday when he was called to the lectern by Mr. Trump, who was holding a final news conference after the NATO summit.
“We had a productive conversation,” Mr. Pompeo told reporters. “There remains a great deal of work to do.”
The letter released by Mr. Trump is filled with flowery language, but it makes no mention of nuclear weapons or any intention by the North to give them up.
“I deeply appreciate the energetic and extraordinary efforts made by Your Excellency Mr. President for the improvement of relations between the two countries and the faithful implementation of the joint statement,” it said.