This was reported by U.S. President's Special Representative for Ukraine and russia, Keith Kellogg, on the social network X on February 21.
"A long and intense day with the senior leadership of Ukraine. Extensive and positive discussions with @ZelenskyyUa, the embattled and courageous leader of a nation at war and his talented national security team", - Kellogg wrote.
As reported, Zelensky and Kellogg discussed the return of prisoners and effective security guarantees.