Ukrainian President Volodymyr Zelenskiy postponed his visit to Saudi Arabia in order to not give "legitimacy" to Tuesday's meeting between U.S. and Russian officials in Riyadh, two sources familiar with the matter told Reuters.

Secretary of State Marco Rubio met with top Russian officials in Saudi Arabia on Tuesday to discuss the war in Ukraine. Ukrainian President Volodymyr Zelenskyy has said he will not accept any outcome from these talks since he has been left out of the process.

Six officials say they believe Russian President Putin could agree to a ceasefire with Ukraine because it would give his military some time to reset and rebuild. However, he is not interested in a "real peace deal.