Konstantyn (57), a Ukrainian serviceman with the the 1st Tank Brigade, adjusts his helmet in a trench during incoming artillery shelling, amid Russia's attack on Ukraine, at the frontline near Donetsk, Ukraine, April 8, 2023. REUTERS/Kai Pfaffenbach TPX IMAGES OF THE DAY

Ukrainian service man Yuzik (43) of the 24th brigade walks through the trenches at the frontline, amid Russia?s attack on Ukraine, near Niu York, Donetsk region, Ukraine, April 4, 2023. REUTERS/Kai Pfaffenbach

Ukrainian servicemen with the 1st Tank Brigade stand in a trench amid incoming artillery shelling as Russia's attack on Ukraine continues, at the frontline near Donetsk, Ukraine, April 8, 2023. REUTERS/Kai Pfaffenbach

Ukrainian service man Yuzik (43) of the 24th brigade smokes a cigarette at his shelter in the trenches at the frontline, amid Russia?s attack on Ukraine near Niu York, Donetsk region, Ukraine, April 4, 2023. REUTERS/Kai Pfaffenbach

A shovel and an assault rifle are seen in a trench amid Russia's attack on Ukraine at the frontline near Donetsk, Ukraine, April 8, 2023. REUTERS/Kai Pfaffenbach

A Ukrainian serviceman with the 1st Tank Brigade listens to incoming artillery shelling in a trench amid Russia's attack on Ukraine at the frontline near Donetsk, Ukraine, April 8, 2023. REUTERS/Kai Pfaffenbach

A Ukrainian serviceman clears a trench amid Russia's attack on Ukraine at the frontline near Donetsk, Ukraine, April 8, 2023. REUTERS/Kai Pfaffenbach

Ukrainian service man Oleksandr of 24th brigade stands guard at his position in the trenches at the frontline, amid Russia?s attack on Ukraine near Niu York, Donetsk region, Ukraine, April 4, 2023. REUTERS/Kai Pfaffenbach

Ukrainian service member from 28th mechanised brigade fires his machine gun at the frontline, amid Russia?s attack on Ukraine in the region of Bakhmut, Ukraine, April 5, 2023. REUTERS/Kai Pfaffenbach

A view shows grenades ready to be used at a position in the trenches at the frontline, amid Russia?s attack on Ukraine, near Niu York, Donetsk region, Ukraine, April 4, 2023. REUTERS/Kai Pfaffenbach

Ukrainian servicemen from 28th mechanised brigade having a cigarette as they take cover from incoming fire in the bunker of their trenches incoming fire at the frontline, amid Russia?s attack on Ukraine in the region of Bakhmut, Ukraine, April 5, 2023. REUTERS/Kai Pfaffenbach

Ukrainian service members from 28th mechanised brigade take cover from incoming fire in the bunker of their trenches at the frontline, amid Russia?s attack on Ukraine in the region of Bakhmut, Ukraine, April 5, 2023. REUTERS/Kai Pfaffenbach

Ukrainian service members from 28th mechanised brigade take cover from incoming fire at their trenches at the frontline, amid Russia?s attack on Ukraine in the region of Bakhmut, Ukraine, April 5, 2023. REUTERS/Kai Pfaffenbach