People react during a memorial ceremony for members of the Brotherhood volunteer's battalion, killed during a raid on Russian territory on December 25, according to Russian FSB security services, amid Russia's attack on Ukraine, in Kyiv, Ukraine March 7, 2023. REUTERS/Alina Yarysh 

Ukrainian servicemen carry coffins with the bodies of members of the Brotherhood volunteer's battalion, killed during a raid on Russian territory on December 25, according to Russian FSB security services, amid Russia's attack on Ukraine, during a memorial ceremony in Kyiv, Ukraine March 7, 2023. REUTERS/Alina Yarysh 

People attend a memorial service for members of the Brotherhood volunteer's battalion, killed during a raid on Russian territory on December 25, according to Russian FSB security services, amid Russia's attack on Ukraine, in Kyiv, Ukraine March 7, 2023. REUTERS/Alina Yarysh 

People react during a memorial ceremony for members of Brotherhood volunteer's battalion, killed during a raid on Russian territory on December 25, according to Russian FSB security services, amid Russia's attack on Ukraine, in Kyiv, Ukraine March 7, 2023. REUTERS/Alina Yarysh TPX IMAGES OF THE DAY 

Ukrainian servicemen carry coffins with the bodies of members of the Brotherhood volunteer's battalion, killed during a raid on Russian territory on December 25, according to Russian FSB security services, amid Russia's attack on Ukraine, during a memorial ceremony in Kyiv, Ukraine March 7, 2023. REUTERS/Alina Yarysh 

Ukrainian servicemen carry a coffin with the body of one of the members of Brotherhood volunteer's battalion, killed during a raid on Russian territory on December 25, according to Russian FSB security services, amid Russia's attack on Ukraine, during a memorial ceremony in Kyiv, Ukraine March 7, 2023. REUTERS/Alina Yarysh 

Two men join hands together during a memorial ceremony for members of the Brotherhood volunteer's battalion, killed during a raid on Russian territory on December 25, according to Russian FSB security services, amid Russia's attack on Ukraine, in Kyiv, Ukraine March 7, 2023. REUTERS/Alina Yarysh 

A man reacts during a memorial ceremony for members of the Brotherhood volunteer's battalion, killed during a raid on Russian territory on December 25, according to Russian FSB security services, amid Russia's attack on Ukraine, in Kyiv, Ukraine March 7, 2023. REUTERS/Alina Yarysh 

Ukrainian servicemen carry a coffin with the body of a member of the Brotherhood volunteer's battalion, killed during a raid on Russian territory on December 25, according to Russian FSB security services, amid Russia's attack on Ukraine, during a memorial ceremony, in Kyiv, Ukraine March 7, 2023. REUTERS/Alina Yarysh 

People attend a memorial service for members of the Brotherhood volunteer's battalion, killed during a raid on Russian territory on December 25, according to Russian FSB security services, amid Russia's attack on Ukraine, in Kyiv, Ukraine March 7, 2023. REUTERS/Alina Yarysh 

An Orthodox priest conducts a memorial service for members of the Brotherhood volunteer's battalion, killed during a raid on Russian territory on December 25, according to Russian FSB security services, amid Russia's attack on Ukraine, in Kyiv, Ukraine March 7, 2023. REUTERS/Alina Yarysh 

Ukrainian servicemen attend a memorial ceremony for members of the Brotherhood volunteer's battalion, killed during a raid on Russian territory on December 25, according to Russian FSB security services, amid Russia's attack on Ukraine, in Kyiv, Ukraine March 7, 2023. REUTERS/Alina Yarysh