MOSCOW, Aug. 19 (Xinhua) -- Russia does not reject any formats, either bilateral or trilateral, on resolving the conflict in Ukraine, Russian Foreign Minister Sergei Lavrov said Tuesday.

Speaking on state TV's Rossiya-24 channel, he also noted that any contacts over Ukraine involving top officials need to be prepared "extremely carefully."

The foreign minister added that there can be no talk of any long-term agreements without respect for Russia's security and the rights of Russians in Ukraine.

On Monday night, U.S. President Donald Trump said in a post on the Truth Social platform that he had called Russian President Vladimir Putin and began arranging a bilateral meeting between Putin and Ukrainian President Volodymyr Zelensky, with the location to be determined.

Trump added that after a Putin-Zelensky meeting, a trilateral meeting involving U.S., Russian and Ukrainian leaders would take place. Enditem