An evacuation of civilians from Mariupol was underway on Sunday as women and children confined to bunkers beneath a sprawling steel plant started to make their way to safety, according to Ukrainian officials and the United Nations.
President Volodymyr Zelensky said that about 100 civilians were being evacuated from the Azovstal factory and are heading to a “controlled area.”
“Tomorrow we’ll meet them in Zaporizhzhia,” he wrote on Twitter. He said that they were working with the United Nations and other international groups to evacuate more people.
The International Committee of the Red Cross confirmed that it was assisting in a “safe passage operation” in coordination with the United Nations as well as Ukrainian and Russian authorities.
While a handful of people were evacuated on Saturday — with estimates by the Ukrainians and Russians ranging from 20 to 46 — the I.C.R.C. said that “no details can be shared until the situation allows, as it could seriously jeopardize the safety of the civilians and the convoy.”
A United Nations official confirmed that the operation was underway but said details would be available only when it was clear that people had made it to safety.
The Mariupol City Council said Sunday in a message on Telegram that the evacuation of civilians in other parts of the city would be delayed until Monday, for security reasons. Before the war, some 450,000 people lived in the port city. There are now estimated to be around 100,000 people living in the ruins of the destroyed metropolis.
Ukrainian officials have said more than 20,000 civilians have been killed and have accused the Russians of digging mass graves to hide the extent of the slaughter.
The I.C.R.C. said that a convoy of vehicles began making its way to Mariupol on April 29 and traveled 150 miles before arriving on Saturday morning.