President Zelenskiy has compared Putin's occupation of Ukraine to the actions of the Nazis in World War II, as Ukraine marks May 8, Remembrance and Reconciliation Day.

In a video message he asks: “Never again? Try to show Ukraine this "and makes comparisons between Ukraine's battle against Russia and World War II against fascism. 

"Decades after World War II, darkness returned to Ukraine. And it became black and white again. Again! Evil is back. Again! With different uniforms, with different slogans, but for the same purpose. A bloody reconstruction of Nazism was organized in Ukraine. A fanatical repetition of this regime. His ideas, actions, words and symbols. A new world record for xenophobia, hatred, racism and the number of victims it can cause." 

President Zelensky is also expected to hold talks with G7 leaders - including US President Joe Biden and UK President Boris Johnson - via video conference later. Ambassadors from EU member states will also meet in Brussels on Sunday to discuss their sixth round of economic sanctions against Moscow. 

Sunday's meeting is held on the day when Europe traditionally marks the end of World War II and liberation from Nazi forces. Russia marks the end of that war on Monday.