Tombs of Ukrainian servicemen in a cemetery in Chernihiv, Ukraine, damanged by shelling on Saturday. Photo: VCG

Firefighters extinguish a fire at Lysychansk Oil Refinery after it was hit by a missile in the Luhansk region of Ukraine, Saturday. Photo: IC Photo

A car passes the Lysychansk Oil Refinery after it was hit by a missile on Saturday. Photo: IC Photo

A Ukrainian soldier sits atop a tank passing the Lysychansk Oil Refinery after the direct hit this weekend. Photo: IC Photo

Smoke belches over the Azovstal iron and steel works in the city of Mariupol on Thursday. Photo: IC Photo

Russia announced Saturday that the entire urban area of the battered port of Mariupol in eastern Ukraine had been taken, even as it told Ukrainian soldiers still holding out to lay down their arms on Sunday. Photo: IC Photo

Burned-out vehicles can be seen on a street in the city of Mariupol on Sunday. The city’s remaining defenders defied Russia’s surrender-or-die demand, with trapped troops still holding out against Russian forces, according to a report by CNN. Photo: VCG

A man sits and a husky dog lies on the ground in the city of Mariupol on Friday. Photo: VCG

A man stands next the turret of a destroyed tank near the village of Zalissya, northeast of Kyiv, Ukraine, on Thursday. Photo: VCG

People look at the crater of an explosion in a village of Horodnya, Chernihiv region, Ukraine, on Thursday. Photo: VCG

A resident of Kharkiv shows mine clearers where a rocket struck the roof of a residential building as they sweep the area on Friday. Photo: VCG

Two Ukrainian military soldiers walk through debris caused by shelling in Kharkiv, Ukraine, on Saturday. Photo: VCG