The bodies of nine civilians, some showing signs of torture, have been found in the town of Borodyanka outside the Ukrainian capital Kyiv, a senior police official said.
Russia told Ukrainian forces fighting in the besieged southern port of Mariupol to lay down their arms starting 6 a.m. Moscow time (0300 GMT) on Sunday to save their lives.
Ukrainian President Volodymyr Zelenskiy said on Wednesday in an address to Estonia's parliament that Russia was using phosphorous bombs in Ukraine, accusing Moscow of using terror tactics against civilians.
The names of the dead are scrawled on the peeling wall of a school basement where residents say more than 300 people were trapped for weeks by Russian occupiers in Yahidne, a village north of the Ukrainian capital Kyiv.