It is reported by RIA Novosti.
According to Melnyk, Zelensky "is also ready to conduct direct negotiations with President Putin at any time."
In his opinion, the Russian side "rejects" Kiev's proposals.
Earlier, the head of the office of the President of Ukraine, Andriy Yermak, confirmed Zelensky's readiness for negotiations with Putin.
The press secretary of the Russian leader Dmitry Peskov commented on the possibility of a meeting between Zelensky and Putin.