A senior North Korean official is headed to New York to discuss an upcoming summit, U.S. President Donald Trump said on Tuesday, the latest indication that an on-again-off-again meeting between Trump and North Korea’s leader may go ahead next month, Reuters reported.

“We have put a great team together for our talks with North Korea,” Trump said in a Twitter post. “Meetings are currently taking place concerning Summit, and more. Kim Young (sic) Chol, the Vice Chairman of North Korea, heading now to New York. Solid response to my letter, thank you!”