A hospital window shattered by shelling in Mariupol, Ukraine on Thursday. The agreement between Russia and Ukraine to evacuate residents from the city fell apart Saturday. Photo: VCG

People evacuated from Mariupol stand outside a tent in the village of Bezymennoye on Saturday, when Russia declared a ceasefire and opened humanitarian corridors for people to leave Mariupol and Volnovakha. Photo: VCG

Evacuated Mariupol children play at a relief center in the village of Bezymennoye on Sunday. The evacuation corridor from Mariupol was closed after shelling resumed. Photo: VCG

Servicemen inspect documents of evacuated Mariupol civilians on their way to a relief center on Sunday. Photo: VCG

Mariupol refugees take a bus to a relief center in Bezymennoye on Sunday. Photo: VCG

A woman from Mariupol holds her dogs at an emergency service station in Bezymennoye on Saturday. Photo: VCG

Rescue workers help a man who evacuated from Mariupol at a tent camp in Bezymennoye on Saturday. Photo: VCG

An ambulance parked at the emergency service station in Bezymennoye on Sunday. Photo: VCG

Marina Yatsko and her boyfriend Fedor comfort each other after their 18-month-old son Kirill was killed by a shell in a hospital in Mariupol on Friday. Photo: VCG

Smoke rises over the outskirts of Mariupol on Sunday. The city has been encircled by Russian forces, leaving residents without food, heat and electricity. Photo: VCG