Ukrainian artillery fires towards the frontline during heavy fighting amid Russia's attack on Ukraine, near Bakhmut, Ukraine on April 13, 2023. (Photo by Kai Pfaffenbach/Reuters)

Ukrainian service members walk to an armoured personnel carrier outside of the frontline town of Bakhmut, amid Russia's attack on Ukraine, in Donetsk region, Ukraine on May 23, 2023. (Photo by Yevhenii Zavhorodnii/Reuters)

Ukrainian servicemen fire toward Russian troops with a tank at a position in Donetsk region, as Russia's attack on Ukraine continues, Ukraine on August 12, 2022. (Photo by Reuters/Stringer)

A Ukrainian gunner sits in his 2S1 Gvozdika (122-mm self-propelled howitzer) on the front line in Southern Ukraine on October 8, 2022, amid the Russian invasion of Ukraine. (Photo by Dimitar Dilkoff/AFP Photo)

A Ukrainian service member smokes near a frontline, amid Russia's attack on Ukraine, in Donetsk region, Ukraine on February 8, 2023. (Photo by Yevhenii Zavhorodnii/Reuters)

Military chaplain Yurii looks on in a trench after an Orthodox Easter service for Ukrainian servicemen at their position, as Russia's attack on Ukraine continues, in Kharkiv region, Ukraine on April 15, 2023. (Photo by Sofiia Gatilova/Reuters)

An injured fan is helped by a riot policeman during clashes between Red Star Belgrade and Partizan Belgrade fans in the stadium before the teams' Serbian Superliga soccer match in Belgrade, April 25, 2015. Serbian league leaders Partizan Belgrade held champions and bitter city foes Red Star to a 0-0 draw in a derby match marred by bad crowd trouble before kickoff on Saturday. The start was delayed for 45 minutes after home Red Star supporters pelted riot police with seats and flares, forcing officers to retreat from the north tier that houses the club's diehard fans. (Photo by Marko Djurica/Reuters)

Relatives of Ukrainian photographer Maksim Levin, killed while covering Russia's attack on Ukraine, react during his funeral in the town of Boiarka, outside of Kyiv, Ukraine on April 4, 2022. (Photo by Valentyn Ogirenko/Reuters)