Black smoke billows over Sievierodonetsk as Russia's invasion on Ukraine continues, Luhansk Region, Ukraine, in this still image obtained from a handout video released on June 9. Photo: Reuters

A Ukrainian service member sits in a trench at a position on the front line, amid Russia's attack on Ukraine, near the town of New York, Donetsk region, Ukraine June 9. Photo: Reuters

A Ukrainian service member shoots from a machine gun at a position on the front line, amid Russia's attack on Ukraine, near the town of New York, Donetsk region, Ukraine June 9. Photo: Reuters

A Ukrainian service member stands in a trench at a position on the front line, amid Russia's attack on Ukraine, near the town of New York, Donetsk region, Ukraine June 9. Photo: Reuters

A Ukrainian service member stands in a trench at a position on the front line, amid Russia's attack on Ukraine, near the town of New York, Donetsk region, Ukraine June 9. Photo: Reuters

Press officer Olexii Mischenko shows a destroyed city administration building in Bashtanka, Mykolaiv region, as Russia's attack on Ukraine continues, Ukraine June 9. Photo: Reuters

Parts of a rocket are pictured outside a destroyed city administration building in Bashtanka, Mykolaiv region, as Russia's attack on Ukraine continues, Ukraine June 9. Photo: Reuters

A Ukrainian service member shoots from a machine gun at a position on the front line, amid Russia's attack on Ukraine, near the town of New York, Donetsk region, Ukraine June 9. Photo: Reuters

A Ukrainian service member walks at a position on the front line, amid Russia's attack on Ukraine, near the town of New York, Donetsk region, Ukraine June 9. Photo: Reuters

Parts of a rocket collected by farmers after an attack, are seen in a wheat farm in Bashtanka, Mykolaiv region, as Russia's attacks on Ukraine continue, Ukraine June 9. Photo: Reuters

FILE PHOTO: Houses burn after shelling, as Russia's attack on Ukraine continues, in the town of Marinka, in Donetsk region, Ukraine June 3, 2022. Picture taken June 3. Photo: Reuters

Firefighters remove debris searching a casualty following a military strike, as Russia's attack on Ukraine continues, in Kharkiv, Ukraine June 9. Photo: Reuters

Charred remains of an ice sports venue are seen in Sievierodonetsk, Luhansk Region, Ukraine, in this image released June 9. Photo: Reuters

Black smoke billows over Sievierodonetsk Azot chemical plant as Russia's invasion on Ukraine continues, in Sievierodonetsk, Luhansk Region, Ukraine, in this still image obtained from a handout video released on June 9. Photo: Reuters