North Korea's leader Kim Jong Un and U.S. President Donald Trump walk at the Metropole hotel during the second North Korea-U.S. summit in Hanoi, Vietnam February 28, 2019. REUTERS/Leah Millis

ABOARD AIR FORCE ONE (Reuters) - U.S. President Donald Trump told the leaders of South Korea and Japan that the United States would continue to work with them and talk to North Korea, White House press secretary Sarah Sanders said on Thursday.

Trump spoke to South Korean President Moon Jae-in and Japanese Prime Minister Shinzo Abe from Air Force One, Sanders told reporters aboard the flight, as he flew home after a summit in Vietnam with Korean leader Kim Jong Un that did not yield an agreement.