A Ukrainian serviceman stands near the wreck of a Russian tank on the front line in the Kyiv region, Ukraine March 28, 2022. REUTERS/Gleb Garanich 

A Ukrainian service member walks on the front line near Kyiv as Russia's invasion of Ukraine continues, Ukraine March 29, 2022. REUTERS/Gleb Garanich 

Ukrainian service members walk on the front line near Kyiv as Russia's invasion of Ukraine continues, Ukraine March 29, 2022. REUTERS/Gleb Garanich 

Wrecks of a Russian Armoured Personnel Carriers (APC) and military vehicles are seen on the front line near Kyiv as Russia's invasion of Ukraine continues, Ukraine March 29, 2022. REUTERS/Gleb Garanich 

A Ukrainian service member rests on the front line near Kyiv as Russia's invasion of Ukraine continues, Ukraine March 29, 2022. REUTERS/Gleb Garanich 

A Ukrainian service member hugs a dog that was abandoned by the owners, inside a house that the residents left, on the front line near Kyiv as Russia's invasion of Ukraine continues, Ukraine March 29, 2022. REUTERS/Gleb Garanich 

A Ukrainian serviceman stands near the wreck of a Russian Armoured Personnel Carriers (APC) on the front line in the Kyiv region, Ukraine March 28, 2022. REUTERS/Gleb Garanich 

Ukrainian service members hide from the shelling on the front line near Kyiv as Russia's invasion of Ukraine continues, Ukraine March 29, 2022. REUTERS/Gleb Garanich 

A destroyed building is seen on the front line near Kyiv as Russia's invasion of Ukraine continues, Ukraine March 29, 2022. REUTERS/Gleb Garanich 

A wreck of a Russian Armoured Personnel Carriers (APC) is seen on the front line in the Kyiv region, Ukraine March 28, 2022. REUTERS/Gleb Garanich 

Ukrainian service members walk at a position on the front line in the Kyiv region, Ukraine March 28, 2022. REUTERS/Gleb Garanich 

A Ukrainian service member looks at a toy machine gun inside a house that the residents left, on the front line near Kyiv as Russia's invasion of Ukraine continues, Ukraine March 29, 2022. REUTERS/Gleb Garanich 

A Ukrainian serviceman walks past the wreck of a Russian tank in the village of Lukyanivka outside Kyiv, as Russia's invasion of Ukraine continues, Ukraine, March 27, 2022. REUTERS/Marko Djurica TPX IMAGES OF THE DAY 

A Ukrainian serviceman walks near the wreck of a Russian tank on the front line in the Kyiv region, Ukraine March 28, 2022. REUTERS/Gleb Garanich 

Ukrainian service members walk on the front line near Kyiv as Russia's invasion of Ukraine continues, Ukraine March 29, 2022. REUTERS/Gleb Garanich 

A Ukrainian soldier takes position at an advanced post as Russia's attack on Ukraine continues, in north of Kyiv, Ukraine March 29, 2022. REUTERS/Zohra Bensemra 

Toy cars are seen in the yard of the destroyed house on the front line near Kyiv as Russia's invasion of Ukraine continues, Ukraine March 29, 2022. REUTERS/Gleb Garanich 

Ukrainian service members walk on the front line near Kyiv as Russia's invasion of Ukraine continues, Ukraine March 29, 2022. REUTERS/Gleb Garanich 

Ukrainian service members walk on the front line near Kyiv as Russia's invasion of Ukraine continues, Ukraine March 29, 2022. REUTERS/Gleb Garanich 

Wrecks of a Russian Armoured Personnel Carriers (APC) are seen in the north Kyiv region, Ukraine March 28, 2022.REUTERS/Gleb Garanich 

A Ukrainian service member walks on the front line near Kyiv as Russia's invasion of Ukraine continues, Ukraine March 29, 2022. REUTERS/Gleb Garanich 

A view from inside a house that the residents left, on the front line in the Kyiv region, Ukraine March 28, 2022. REUTERS/Gleb Garanich TPX IMAGES OF THE DAY 

Destroyed houses and a car are seen on the front line near Kyiv as Russia's invasion of Ukraine continues, Ukraine March 29, 2022. REUTERS/Gleb Garanich 

A Ukrainian serviceman stands on top of a Russian tank captured after fighting with Russian troops in the village of Lukyanivka outside Kyiv, as Russia's invasion of Ukraine continues, Ukraine, March 27, 2022. REUTERS/Marko Djurica 

Marat Saifulin, Ukrainian serviceman stands in the village of Lukyanivka outside Kyiv, as Russia's invasion of Ukraine continues, Ukraine, March 27, 2022. REUTERS/Marko Djurica