North Korean leader Kim Jong Un has sent a letter to President Donald Trump praising progress in relations between the two countries and bringing up the possibility of another meeting between the two state heads.
"Great progress being made", the president said in a tweet that included both a copy of Kim's letter, dated 6 July, and its translation.
In his note, Kim offered no reassurances that he is committed to relinquishing his country's nuclear weapons or ballistic missile arsenal, referring more generally to "the faithful implementation of the joint statement" agreed to in Singapore.
Mr Trump describes the letter as a "very nice note" and says, "Great progress being made!".
Though Kim's letter mentions sticking to the joint statement released in Singapore, which does mention denuclearization, North Korea has consistently resisted efforts to verifably disarm.
Pompeo said his counterpart Kim Yong Chol in North Korea "made a commitment" that North Korea intends "to denuclearize". "We will be ready".
Trump and Kim met in Singapore last month during an historic sit-down between the USA and the North.
North Korea's criticism of talks with Pompeo fueled further doubts about whether Trump will ever achieve his goal of "complete denuclearization", much less on the timeline of one to 2-1/2 years set out by various administration officials.
A planned meeting Thursday between North Korean and US officials in the Demilitarized Zone between the two Koreas to discuss the return of the remains was postponed.
North Korea has returned the remains of some USA soldiers to the United States over the years since 1953, when an armistice halted the Korean War.
At the conclusion of the Singapore summit last month, Trump suggested he may invite Kim to the White House, or his retreat at Mar-a-Lago in Florida.
DPRK is the acronym of North Korea's official name, the Democratic People's Republic of Korea. About 100 wooden transport cases were sent to the DMZ in recent weeks to prepare for receiving United States troop remains.
Pompeo insisted that a raft of tough economic sanctions imposed on North Korea would remain in place until "final, fully verified denuclearisation" occurs.
Pompeo had said a Pentagon team would meet with the North's officials on or around Thursday at the inter-Korea border to discuss the repatriation.
Speaking to Fox News about the possibility of a Kim visit to the White House, Trump said last month that such a visit "could happen", and added that he and Kim "had good chemistry".