A planned meeting between U.S. Secretary of State Mike Pompeo and the right-hand man to North Korean leader Kim Jong Un in New York has been postponed, the State Department said in a short statement just two days before the meeting had been scheduled to be held.

The rare visit to the United States by a top North Korean official, Kim Yong Chol, the vice chairman of the North's Central Committee, had been scheduled to take place in New York on Thursday, and the sudden cancelation was likely to raise questions about the ongoing nuclear negotiations with Pyongyang.

A reason was not immediately provided for the postponement, but the statement said the two sides would "reconvene when our respective schedules permit."