The key Ukrainian port city of Mariupol is on the verge of a humanitarian catastrophe and must be completely evacuated, said its mayor.
Around 160,000 civilians were trapped in the city without power on Monday, said Mayor Vadym Boichenko.
He added that 26 buses were waiting to evacuate civilians but Russian forces had not agreed to give them safe passage.
“The Russian Federation is playing with us,” he said.
Russian forces have enriched the city, leaving civilians desperately short of water, food and medicine.
Earlier, the International Committee of the Red Cross (ICRC) said it is still unable to get any aid into besieged Mariupol, as it requires Russia and Ukraine to guarantee safe passage.
Russia has denied targeting civilians and blames Ukraine for the repeated failure to agree on safe corridors for trapped civilians.