The UN Human Rights office says at least 902 civilians have died since Russia's invasion of Ukraine.
A rescue mission is underway in the south-eastern region after an art school - where 400 people were believed to be sheltering - was bombed.
Meanwhile, the mayor of Mariupol claims citizens are being forced into Russia - this hasn't been independently verified, though.
Ukrainian MP, Yegor Chernev has condemned Moscow's tactics:
"They fire to schools, they fire to the universities, they fire to shelters. You know I even can't find the proper words how to describe their, their behaviour against civilians."
