The government estimated early on that around 300 people died and has since opened a war crimes investigation, paperwork obtained by the AP said.
Some Ukrainian fighters are still holed up in the plant in Mariupol.
The move comes almost two weeks after Russian president Vladimir Putin ordered his military not to storm the facility, but block it off instead.
Russia is planning to annex large parts of eastern Ukraine this month, a senior US official also warned.
Deliveroo backtracked on its plan to extend working shifts to 14 hours a day.
While official evacuations have often faltered, many people have managed to flee Mariupol under their own steam in recent weeks.
The tales began just days into the war and circulated for months, bolstered by official Ukrainian accounts.
As many as 100,000 people are believed to be in the blockaded port city still.
As many as 100,000 people are believed to be in the blockaded port city still.
Trolls are said to be amplifying pro-Kremlin viewpoints while targeting Boris Johnson’s social media accounts.
Meanwhile, a senior US defence official said Moscow’s offensive is going much slower than planned.
Marcin Zawisza is offering his home to Olena Stadnik, who has been stuck near the Russian-occupied city of Kherson in southern Ukraine.
Civic authorities in the embattled Ukrainian city say Russian occupiers are failing to provide food, water and medicines.
Gazprom said it had cut natural gas deliveries to the two EU member states because they refused to pay in Russian roubles.
US defence secretary Lloyd Austin convened a meeting of officials from around 40 countries at the Ramstein Air Base in Germany to pledge more weapons.
