The southern port of Mariupol, say some 400-thousand people trapped by surrounding Russian troops will begin to be led to safety this morning.
Yesterday, a similar evacuation plan was abandoned after a temporary ceasefire wasn't observed, with both sides blaming the other.
Russia claims it's struck - and disabled - a Ukrainian air base with long-range high-precision weapons.
There's been no independent verification of that - but Moscow also says it's shot down 10 planes and helicopters over the past 24 hours.
Ukraine's President Volodymyr Zelenskyy, has repeatedly called for a no-fly zone over his country, but NATO's rejected the requests, saying that could escalate the war.
But Kurt Volker - a former US Ambassador to the military alliance - thinks a limited one could be introduced, to cover the capital and humanitarian corridors out of Ukraine.
