Ukraine has offered an unconditional 30-day ceasefire and a meeting between Zelenskyy and Russian leader Vladimir Putin to break the deadlock. But the Kremlin has effectively rejected a truce and hasn't budged from its demands.
"The Kremlin continues efforts to falsely portray Russia as willing to engage in good-faith negotiations to end the war in Ukraine, despite Russia's repeated refusal to offer any concessions," the Institute for the Study of War, a Washington-based think tank, said late Thursday.
Putin said in a phone call with U.S. President Donald Trump earlier this week that he would respond to Ukraine's daring long-range attack on Russian air bases on Sunday.
Ukrainian Foreign Minister Andrii Sybiha said the attacks demonstrated key differences between Russia and Ukraine.