Citing a diplomatic source, the South's Chosun Ilbo newspaper reported today that Kim Yong-chol, Pompeo's counterpart in the discussion process, was expected to visit Washington later this week for talks.
The CNN reporter also said, Kim Yong-chol is not planning to visit the North Korean mission to the United Nations in NY.
His visit to the U.S., where he may meet with Pompeo, comes as plans are underway for a second Trump-Kim summit, possibly in Vietnam.
Observers say similar incidents could occur frequently as South Korea's liberal government pushes for deeper exchanges with North Korea.
Denouncing Japan's request for the confidential information as unfair, South Korea's Defense Ministry said it was sure its navy destroyer had not sent out any signals.
"We're moving forward in these conversations, lots of ideas about how we might continue to decrease the risk to the American people. whether that's by our success to date in stopping their missile testing, stopping their nuclear testing", Pompeo told Fox News on Friday.
FILE - In this July 26, 2015, file photo, North Koreans look at paintings on display in Pyongyang, North Korea.More news: 'What About That Son?' - Rossi Impressed Fergie During Man Utd Training
Kim, along with North Korea's vice foreign minister Choe Son Hui, and a third official, will leave Beijing on Thursday for Washington, Yonhap said, citing an unidentified Chinese airport official. And that was only days after Trump undermined national security adviser John Bolton's claim that the United States would not withdraw troops from Syria until the Kurds' safety is assured.
Kim Yong Chol last came to the United States in June.
Trump and Kim pledged at their first summit, in Singapore in June, to work toward denuclearization "of the Korean peninsula". But the nuclear and missile threat from the North remains real, and some critics believe the defense white paper should more clearly reflect that to maintain vigilance among the armed forces.
There has been no indication, however, of any narrowing of differences over USA demands that North Korea abandon a nuclear weapons programme that threatens the U.S. or Pyongyang's demand for a lifting of punishing sanctions.
Many critics accuse the Trump administration of failing to get Pyongyang to agree to specifics at their first summit.
In his speech at the State Department, U.S. Vice President Mike Pence said.
The president laid out his administration's Missile Defense Review - the first compiled since 2010 - during a speech at the Pentagon, where he highlighted the threat the US faces from new missile technologies being developed by foreign nations and the growing importance of weaponizing space.
"At the second summit, they'll probably focus on reaching a possible interim deal, rather than a comprehensive roadmap for denuclearization", said Cheong Seong-chang, a senior fellow at South Korea's Sejong Institute.