Ukrainian servicemen with the Dnipro-1 Special Tasks Patrol Police regiment Raphael Karapitian, 45, walks with with weapons beside a decorated Christmas tree in the trenches on the front line, as Russia's attack on Ukraine continues, on Christmas Eve in Bakhmut, Ukraine, December 24, 2022. REUTERS/Clodagh Kilcoyne TPX IMAGES OF THE DAY 

Artists perform during Christmas celebrations at a position of servicemen of the Ukraine National Guard, amid Russia's attack on Ukraine, in Kharkiv region, Ukraine December 24, 2022. REUTERS/Vyacheslav Madiyevskyy TPX IMAGES OF THE DAY 

A Christmas tree is seen in front of an Orthodox cathedral during a service on the eve of Christmas, amid Russia’s attack on Ukraine continues, in Kyiv, Ukraine December 24, 2022. REUTERS/Valentyn Ogirenko TPX IMAGES OF THE DAY 

Ukrainian territorial defence member Leonid Onyshchenko, 63-year-old, speaks to his family during a festive Christmas dinner, as Russia's attack on Ukraine continues, in Kostiantynivka, Ukraine, December 24, 2022. REUTERS/Clodagh Kilcoyne TPX IMAGES OF THE DAY 

Ukrainian servicemen with the Dnipro-1 Special Tasks Patrol Police regiment Raphael Karapitian, 45 and Roman Kapinus, 39, walks with with weapons beside a decorated Christmas tree in the trenches on the front line, as Russia's attack on Ukraine continues, on Christmas Eve in Bakhmut, Ukraine, December 24, 2022. REUTERS/Clodagh Kilcoyne TPX IMAGES OF THE DAY 

A woman sings a carol in front of a Christmas tree, amid Russia's attack on Ukraine, at the Sofiyska Square in Kyiv, Ukraine December 19, 2022. REUTERS/Valentyn Ogirenko 

People play music during Christmas celebrations in the Church of the Nativity of the Most Holy Theotokos in the village of Kryvorivnia in Ivano-Frankivsk region, Ukraine December 25, 2022. REUTERS/Yuriy Rylchuk TPX IMAGES OF THE DAY 

Relatives and supporters of Ukrainian prisoners of war (POWs) from of the Azov regiment attend a performance named "Azov regiment Christmas in captivity" demanding to speed up their release from a Russian captivity, amid Russia's attack on Ukraine, at the Independence Square in Kyiv, Ukraine December 24, 2022. REUTERS/Gleb Garanich 

A worker decorates a Christmas tree, as a building damaged in the course of Russia-Ukraine conflict is seen in the background, in Mariupol, Russian-controlled Ukraine, December 24, 2022. REUTERS/Alexander Ermochenko 

People take part in Christmas celebrations in the Church of the Nativity of the Most Holy Theotokos in the village of Kryvorivnia in Ivano-Frankivsk region, Ukraine December 25, 2022. REUTERS/Yuriy Rylchuk 

Local residents sing Christmas carols during an air raid alarm, amid Russia's attack on Ukraine, inside a metro station in Kyiv, Ukraine December 25, 2022. REUTERS/Valentyn Ogirenko 

A Ukrainian BM-21 Grad multiple rocket launcher fires a rocket, as Russia's attack on Ukraine continues, during intense shelling on Christmas Day at the frontline in Bakhmut, Ukraine, December 25, 2022. REUTERS/Clodagh Kilcoyne 

A woman takes shelter as a firefighter works to repair a car in a fire station adorned with Christmas decorations, as Russia's attack on Ukraine continues, during intense shelling on Christmas Day at the frontline in Bakhmut, Ukraine, December 25, 2022. REUTERS/Clodagh Kilcoyne 

Orthodox priests conduct a service on the eve of Christmas, amid Russia's attack on Ukraine, in Kyiv, Ukraine December 24, 2022. REUTERS/Valentyn Ogirenko 

A municipal worker decorates a Christmas tree during heavy fog at the Sofiyska square, amid Russia's invasion of Ukraine, in Kyiv, Ukraine December 17, 2022. REUTERS/Vladyslav Musiienko 

A man lights a candle during a service on the eve of Christmas, amid Russia's attack on Ukraine, in Kyiv, Ukraine December 24, 2022. REUTERS/Valentyn Ogirenko 

Ukrainian servicemen with the Dnipro-1 Special Tasks Patrol Police regiment Raphael Karapitian 45, carries a decorated Christmas tree to the trenches on the front line, as Russia's attack on Ukraine continues, on Christmas Eve in Bakhmut, Ukraine, December 24, 2022. REUTERS/Clodagh Kilcoyne 

A believer prays during a service on the eve of Christmas, amid Russia's attack on Ukraine, in Kyiv, Ukraine December 24, 2022. REUTERS/Valentyn Ogirenko 

Artists perform during Christmas celebrations at a position of servicemen of the Ukraine National Guard, amid Russia's attack on Ukraine, in Kharkiv region, Ukraine December 24, 2022. REUTERS/Vyacheslav Madiyevskyy 

A worker decorates a Christmas tree, in the course of Russia-Ukraine conflict in Mariupol, Russian-controlled Ukraine, December 24, 2022. REUTERS/Alexander Ermochenko 

A priest Oleksandr of Orthodox Church of Ukraine conducts the Christmas service at a positions of servicemen of the Ukrainian National Guard, amid Russia's attack on Ukraine, in Kharkiv region, Ukraine December 24, 2022. REUTERS/Vyacheslav Madiyevskyy 

Relatives and supporters of Ukrainian prisoners of war (POWs) from of the Azov regiment attend a performance named "Azov regiment Christmas in captivity" demanding to speed up their release from a Russian captivity, amid Russia's attack on Ukraine, at the Independence Square in Kyiv, Ukraine December 24, 2022. REUTERS/Gleb Garanich 

A firefighter works to repair a car in a fire station adorned with Christmas decorations, as Russia's attack on Ukraine continues, during intense shelling on Christmas Day at the frontline in Bakhmut, Ukraine, December 25, 2022. REUTERS/Clodagh Kilcoyne 

People gather around a Christmas tree, amid Russia's attack on Ukraine, at the Sofiyska Square in Kyiv, Ukraine December 19, 2022. REUTERS/Valentyn Ogirenko