Russian President Vladimir Putin saidhe supported in principle Washington's proposal for a 30-day ceasefire with Ukraine but that his forces would fight on until several crucial conditions were worked out.

Russia and Ukraine have traded heavy aerial blows with both sides reporting more than 100 enemy drones over their respective territories overnight.

Ukraine's allies have agreed to put pressure on Russian President Vladimir Putin to agree to a legitimate cease-fire proposal after a virtual summit of Western nations' leaders that didn't include the United States.