WASHINGTON (AP) — The White House says President Donald Trump "continues to actively prepare" for the president's "expected summit" with North Korea leader Kim Jong Un in Singapore.

White House press secretary Sarah Huckabee Sanders says Trump will meet with Japanese Prime Minister Shinzo Abe at the White House on June 7.

She says Kim Yong Chol, North Korea's vice chairman of the Central Committee, is traveling to New York and will meet with Secretary of State Mike Pompeo later this week.

Sanders says a U.S. delegation is meeting with the North Korean delegation at the DMZ.

Plans for the high-stakes summit have been in flux for days. Last week, Trump withdrew from the meeting, only to announce a day later it could still get back on track.

Trump tweeted early Tuesday: "We have put a great team together for our talks with North Korea. Meetings are currently taking place concerning Summit, and more. Kim Young Chol, the Vice Chairman of North Korea, heading now to New York. Solid response to my letter, thank you!"

South Korea's Yonhap News said Tuesday it saw the name of Kim Yong Chol on the passengers' list for a flight Tuesday from Beijing to Washington. They later reported that Kim changed his flight to go to New York on Wednesday.

Kim is a former military intelligence chief and now a vice chairman of the North Korean ruling party's central committee tasked with inter-Korean relations.