U krainian President Volodymyr Zelenskyy on Wednesday said he told President Donald Trump and European leaders that Russia's Vladimir Putin is "bluffing" on pursuing peace as preparations for Friday's U.S.-Russia summit in Alaska continue.

Russia says it invaded Ukraine to halt Kyiv's ambitions to join NATO, the U.S.-led defensive alliance, which it saw as a major security threat. It also accuses Kyiv of persecuting ethnic Russians and their culture in Ukraine.