Young military cadets take part in a ceremony of receiving their shoulder marks, amid Russia's attack on Ukraine, in Kyiv, Ukraine November 18, 2022. REUTERS/Gleb Garanich 

Young military cadets take part in a ceremony of receiving their shoulder marks, amid Russia's attack on Ukraine, in Kyiv, Ukraine November 18, 2022. REUTERS/Gleb Garanich 

Young military cadets take part in a ceremony of receiving their shoulder marks, amid Russia's attack on Ukraine, in Kyiv, Ukraine November 18, 2022. REUTERS/Gleb Garanich 

Young military cadets take part in a ceremony of receiving their shoulder marks, amid Russia's attack on Ukraine, in Kyiv, Ukraine November 18, 2022. REUTERS/Gleb Garanich 

Young military cadets take part in a ceremony of receiving their shoulder marks, amid Russia's attack on Ukraine, in Kyiv, Ukraine November 18, 2022. REUTERS/Gleb Garanich 

Young military cadets take part in a ceremony of receiving their shoulder marks, amid Russia's attack on Ukraine, in Kyiv, Ukraine November 18, 2022. REUTERS/Gleb Garanich 

Young military cadets take part in a ceremony of receiving their shoulder marks, amid Russia's attack on Ukraine, in Kyiv, Ukraine November 18, 2022. REUTERS/Gleb Garanich 

Young military cadets take part in a ceremony to receive their shoulder marks, amid Russia's attack on Ukraine, in Kyiv, Ukraine November 18, 2022. REUTERS/Gleb Garanich TPX IMAGES OF THE DAY 

A local employee of Ukrainian telecom provider Kyivstar shows a handful of Russian SIM cards discarded by local residents after they switched to Ukrainian SIM cards in Kherson, Ukraine November 17, 2022. REUTERS/Joseph Campbell 

Graves of people who died during a Russian occupation are seen at the city’s cemetery after Russia's retreat Kherson, Ukraine November 17, 2022. REUTERS/Valentyn Ogirenko 

Boxes with artillery shells are seen at a former Russian base after Russia's retreat Kherson, Ukraine November 17, 2022. REUTERS/Valentyn Ogirenko 

Parts of uniform of Russian soldiers are seen at their former base after Russia's retreat Kherson, Ukraine November 17, 2022. REUTERS/Valentyn Ogirenko 

A man fills up jerry cans with petrol at a petrol station after Russia's retreat Kherson, Ukraine November 17, 2022. REUTERS/Valentyn Ogirenko 

Drivers stand in line to buy petrol after Russia's retreat Kherson, Ukraine November 17, 2022. REUTERS/Valentyn Ogirenko 

People receive food aid after Russia's retreat from Kherson, Ukraine November 17, 2022. REUTERS/Murad Sezer 

People wait for food aid after Russia's retreat from Kherson, as Russia's attack on Ukraine continues, Ukraine, November 17, 2022. REUTERS/Murad Sezer 

People wait in line for food distribution after Russia's retreat from Kherson, Ukraine, November 17, 2022. REUTERS/Murad Sezer 

A woman reacts as Ukrainian police forensic experts search for evidence at a park where fighting took place between Ukrainian territorial forces and Russian forces at beginning of the war, in Kherson, Ukraine November 16, 2022. REUTERS/Murad Sezer TPX IMAGES OF THE DAY 

A bottle of vodka is seen at a former position of Russian soldiers at a compound of an international airport after Russia's retreat from Kherson, in Chornobaivka, outside of Kherson, Ukraine November 16, 2022. REUTERS/Valentyn Ogirenko 

Danilo, a six-year-old Ukrainian boy, holds a toy machine gun as he strolls with his friend around their neighbourhood in Kherson, Ukraine November 16, 2022. REUTERS/Murad Sezer 

A Ukrainian serviceman gives an autograph to a local resident in central Kherson, Ukraine November 16, 2022. REUTERS/Murad Sezer TPX IMAGES OF THE DAY 

People wait to receive medical aid distributed by international volunteers in central Kherson, Ukraine November 16, 2022. REUTERS/Murad Sezer 

A view shows a former position of Russian soldiers at a compound of an international airport after Russia's retreat from Kherson, in Chornobaivka, outside of Kherson, Ukraine November 16, 2022. REUTERS/Valentyn Ogirenko 

Refrigerators stolen by Russian soldiers are seen at their position at a compound of an international airport after Russia's retreat from Kherson, in Chornobaivka, outside of Kherson, Ukraine November 16, 2022. REUTERS/Valentyn Ogirenko 

Food of Russian soldiers is seen at a compound of an international airport after Russia's retreat from Kherson, in Chornobaivka, outside of Kherson, Ukraine November 16, 2022. REUTERS/Valentyn Ogirenko 

Used Russian artillery shells are seen at a compound of an international airport after Russia's retreat from Kherson, in Chornobaivka, outside of Kherson, Ukraine November 16, 2022. REUTERS/Valentyn Ogirenko 

A general view of a former Russian position at a compound of an international airport after Russia's retreat from Kherson, in Chornobaivka, outside of Kherson, Ukraine November 16, 2022. REUTERS/Valentyn Ogirenko 

Ukrainian police officers rip Russian propaganda billboards off in the city, after Russia's retreat from Kherson, Ukraine November 16, 2022. REUTERS/Valentyn Ogirenko 

A view shows a terminal of an international airport after Russia's retreat from Kherson, in Chornobaivka, outside of Kherson, Ukraine November 16, 2022. REUTERS/Valentyn Ogirenko 

A graffiti of Commander in Chief of the Ukrainian armed Forces Valerii Zaluzhnyi is seen on a terminal of an international airport after Russia's retreat from Kherson, in Chornobaivka, outside of Kherson, Ukraine November 16, 2022. REUTERS/Valentyn Ogirenko 

A view shows a terminal of an international airport after Russia's retreat from Kherson, in Chornobaivka, outside of Kherson, Ukraine November 16, 2022. REUTERS/Valentyn Ogirenko 

A view shows a destroyed Antonov An-24 aircraft at a compound of an international airport after Russia's retreat from Kherson, in Chornobaivka, outside of Kherson, Ukraine November 16, 2022. REUTERS/Valentyn Ogirenko 

Ukrainian police officers rip Russian propaganda billboards off in the city, after Russia's retreat from Kherson, Ukraine November 16, 2022. REUTERS/Valentyn Ogirenko 

Ukrainian police officers ripping Russian propaganda billboards off in the city, after Russia's retreat from Kherson, Ukraine November 16, 2022. REUTERS/Valentyn Ogirenko 

Ukrainian service members sit on vehicles in the city centre after Russia's retreat from Kherson, Ukraine November 16, 2022. REUTERS/Valentyn Ogirenko 

People stand in line on a central square to receive food after Russia's retreat from Kherson, Ukraine November 16, 2022. REUTERS/Valentyn Ogirenko 

People stand in line on a central square as they wait for humanitarian aid after Russia's retreat from Kherson, Ukraine November 16, 2022. REUTERS/Valentyn Ogirenko 

Ukrainian mine experts scan for unexploded ordnance and landmines by the main road to Kherson, Ukraine November 16, 2022. REUTERS/Murad Sezer 

Ukrainian mine experts scan for unexploded ordnance and landmines by the main road to Kherson, Ukraine November 16, 2022. REUTERS/Murad Sezer 

Unexploded ordnance and landmines are seen by the main road to Kherson, Ukraine November 16, 2022. REUTERS/Murad Sezer 

A rag doll is attached on the window of a cell at a preliminary detention centre which, as Ukrainians say, was used by Russian service members to jail and torture people before they retreated from Kherson, Ukraine November 16, 2022. REUTERS/Murad Sezer TPX IMAGES OF THE DAY 

A cloth with the colours of Russian flag is seen on the ground in a cell at a preliminary detention centre, which, as Ukrainians say was used by Russian service members to jailcand torture people, before they retreated from Kherson, Ukraine November 16, 2022. REUTERS/Murad Sezer 

A Ukrainian police officer stands at a preliminary detention centre, which, as Ukrainians say, was used by Russian service members to jail and torture people, before they retreated from Kherson, Ukraine November 16, 2022. REUTERS/Murad Sezer 

A burnt bed is seen in a cell at a preliminary detention centre, which, as Ukrainians say, was used by Russian service members to jail and torture people, before they retreated from Kherson, Ukraine November 16, 2022. REUTERS/Murad Sezer 

Electric cables are seen in a cell at a preliminary detention centre, which, as Ukrainians say, was used by Russian service members to jail and torture people, before they retreated from Kherson, Ukraine November 16, 2022. REUTERS/Murad Sezer 

A media member films a cell at a preliminary detention centre, which, as Ukrainians say, was used by Russian service members to jail and torture people, before they retreated from Kherson, Ukraine November 16, 2022. The slogans in Russian on the wall read: "Glory to Russia !!! Glory to Putin !!!, Glory to Shoigu !!!" REUTERS/Murad Sezer 

A cell is pictured at a preliminary detention centre, which as Ukrainians say, was used by Russian service members to jail and torture people, before they retreated from Kherson, Ukraine November 16, 2022. REUTERS/Murad Sezer 

A view from a preliminary detention centre which, as Ukrainians say, was used by Russian service members to jail and torture people, before they retreated from Kherson, Ukraine November 16, 2022. REUTERS/Murad Sezer 

Books are seen on the ground in a cell at a preliminary detention centre which, as Ukrainians say, was used by Russian service members to jail and torture people, before they retreated from Kherson, Ukraine November 16, 2022. REUTERS/Murad Sezer 

Police officers walk near the site of an explosion in Przewodow, a village in eastern Poland near the border with Ukraine, November 16, 2022. REUTERS/Kacper Pempel 

Mateusz Zub, 30, reacts after an explosion in which two of his colleagues were killed, in Przewodow, a village in eastern Poland near the border with Ukraine, November 16, 2022. REUTERS/Kacper Pempel 

Police officers walk next to a police vehicle at a blockade after an explosion in Przewodow, a village in eastern Poland near the border with Ukraine, November 16, 2022. REUTERS/Kacper Pempel 

Police officers stand at a blockade after an explosion in Przewodow, a village in eastern Poland near the border with Ukraine, November 16, 2022. REUTERS/Kacper Pempel 

Police officers work at the site after explosions in Przewodow, a village in eastern Poland near the border with Ukraine, November 16, 2022. REUTERS/Kacper Pempel 

Vitalii Serdiuk, 65, who says he was tortured by Russian service members, and his wife Olena speak during an interview with Reuters after Russia's retreat from Kherson, Ukraine, November 15, 2022. REUTERS/Valentyn Ogirenko 

A view shows a preliminary detention centre which Ukrainians say was used by Russian service members to jaili and torture people before they retreated from Kherson, Ukraine November 15, 2022. REUTERS/Valentyn Ogirenko 

A portrait of Russian President Vladimir Putin is seen at a preliminary detention centre which Ukrainians say was used by Russian service members to jail and torture people before they retreated, Kherson, Ukraine November 15, 2022. REUTERS/Valentyn Ogirenko TPX IMAGES OF THE DAY 

A view shows part of a preliminary detention centre which Ukrainians say was used by Russian service members for jailing and torturing people before Russia's retreat, Kherson, Ukraine, November 15, 2022. REUTERS/Valentyn Ogirenko 

A view shows a building used by Russians as a military commandant's office and hit by a military strike in Kherson, Ukraine November 15, 2022. REUTERS/Valentyn Ogirenko 

A view shows a building used by Russians as a military commandant's office and hit by a military strike as Russia retreated, Kherson, Ukraine November 15, 2022. REUTERS/Valentyn Ogirenko