The State Department is declining to release any additional information about the calls.
U.S. President Donald Trump admitted Tuesday that if he is wrong about North Korean leader Kim Jong Un's commitment to the "complete denuclearization" of the Korean peninsula, he will never admit to it.
Many North Korea watchers have noted that the Singapore summit agreement lacks substance, despite Trump touting it as "very comprehensive". Trump was joined by Secretary of State Mike Pompeo, National Security Adviser John Bolton, and John Kelly, White House Chief of Staff, for the expanded talks, while Kim's team included former military intelligence chief Kim Yong Chol, foreign minister Ri Yong Ho and Ri Su Yong, vice chairman of the ruling Workers' Party.
United States and North Korea commit to recovering remains of prisoners of war, including the immediate repatriation of those already identified. -South Korea drills has been North Korea's "standard demand" for decades.
"The President's comments [were] very positive and the Statement touches on a new relationship with North Korea, and end to the Korean War, complete denuclearization of the Korean Peninsula and recovering POW/MIA remains - all positive commitments", he said.
When Singaporean Prime Minister Lee Hsien Loong visited the global media center for the summit at F1 Pit Building on Sunday, he said it will cost the city state "around 20 million Singaporean dollars" (W16.1 billion, US$1=W1,078) to host the "historic summit". "I think, honestly, [Kim] is going to do these things".
We're provided two videos as the news flows out of the Singapore meeting.
Speaking at a news conference after the summit in Singapore, Trump said there's more to be done but "we're ready to write a new chapter between our nations". "I'm a realist. I'm not trying to bring democracy to North Korea".
"US must go back to School", said Facebook user Jimi Leong. Moon Jae-in, South Korea's president, said after the meeting had started: "Perhaps the minds of our people are on Singapore".
The historic summit between President Trump and North Korean leader Kim Jong Un resulted in an understanding that Pyongyang would work toward denuclearization.
Members of the USA delegation, including U.S. secretary of state Mike Pompeo, right, and John Bolton, national security adviser, left, and North Korean advisers watch a television screen showing the meeting.