Kim Yong-chol, North Korea's top negotiator and ex-spymaster, and U.S. Secretary of State Mike Pompeo / Yonhap

North Korea will send a top government official to Washington, D.C. later this week, CNN reported Wednesday amid indications that the two sides are moving closer to a second summit.

Kim Yong-chol, North Korea's top negotiator and ex-spymaster, plans to arrive there Thursday (local time) for a two-day stay, according to the broadcaster.

It cited two U.S. sources familiar with ongoing negotiations.

Kim is expected to hold talks with Secretary of State Mike Pompeo on details of a planned summit between President Donald Trump and the communist nation's leader Kim Jong-un.

The North Korean envoy visited the U.S. capital last year, less than two weeks ahead of the Kim-Trump summit in Singapore on June 12. He met with Trump at the White House.

Pompeo had planned to hold a meeting with Kim, vice chairman of the ruling Workers' Party Central Committee, in New York in November, but it was abruptly canceled.

The North's official reportedly hopes to sit down with Trump again.

As usual, he's expected to head to Washington via Beijing.

He and two other North Korean officials booked tickets for a United Airlines flight, UA808, to depart for Washington at 6:25 p.m. on Thursday, according to a Beijing airport official.

It remains unclear whether the former spy agency chief will actually board the plane.

Vice Foreign Minister Choe Son-hui flew into Beijing on Tuesday. (Yonhap)