President Donald Trump warned that "severe consequences" lie ahead for Russia if Russian President Vladimir Putin doesn't agree to stop the Ukraine war after they meet for a high-stakes summit in Alaska on Friday.

Fadeev also said Russia's stance on ending the war in Ukraine has not changed since Putin laid out his conditions last year: the full withdrawal of Ukrainian troops from parts of the Ukrainian regions of Donetsk, Zaporizhzhia and Kherson that they still control, and Ukraine abandoning its plans to join the NATO alliance.

The US president says he held a "very friendly" call with Zelensky and other European leaders ahead of a summit with Putin on Friday.