Refugees look out of a bus prior to their departure to Poland after fleeing from northeastern Ukraine as Russia's invasion continues, outside the main train station in Lviv, Ukraine, March 16, 2022. REUTERS/Kai Pfaffenbach 

People wrapped up in blankets wait outside an immigration office after fleeing from Ukraine to Belgium, following Russia's invasion of Ukraine, in Brussels, Belgium March 15, 2022. REUTERS/Yves Herman 

A woman fleeing Russia's invasion of Ukraine sits in a train to Budapest departing from Zahony, Hungary March 15, 2022. REUTERS/Bernadett Szabo 

A woman waits for transport at the central train station as Russia's invasion of Ukraine continues, in Kyiv, Ukraine, March 15, 2022. REUTERS/Marko Djurica TPX IMAGES OF THE DAY 

Ukrainian refugees Iryna and Caterina ('pink cap') queue after spending all night outside to get one of the 100 daily appointments at the documentation office to apply for temporary protection approved by the European Union that allows residence and a work permit, in Torrevieja, Spain March 15, 2022. REUTERS/Eva Manez 

Manuela, Raquela Kaptar, 2, and Sophia Tarasiuk, 8, watch cartoons on an iPhone at Dumbraveni sports arena which has been converted to a temporary shelter, after they fled with their families from Ukraine through the Siret border crossing in Romania, following Russia's invasion of Ukraine, in Suceava, Romania March 15, 2022. REUTERS/Clodagh Kilcoyne 

A Red Cross member assists a woman as people wait outside an immigration office after fleeing from Ukraine to Belgium, following Russia's invasion of Ukraine, in Brussels, Belgium March 15, 2022. REUTERS/Yves Herman 

A woman, who fled Russia's invasion of Ukraine looks for clothes after she crossed the border from Ukraine to Poland, at the border checkpoint in Medyka, Poland, March 15, 2022. REUTERS/Zohra Bensemra 

Surrogate-born babies are seen inside a special shelter owned by BioTexCom clinic in a residential basement, as Russia's invasion continues, on the outskirts of Kyiv, Ukraine March 15, 2022. Picture taken March 15, 2022. REUTERS/Gleb Garanich 

A woman fleeing Russia's invasion of Ukraine stands in a train to Budapest departing from Zahony, Hungary March 15, 2022. REUTERS/Bernadett Szabo 

Kathia, a Ukrainian refugee and her boyfriend Ruben, a Mexican working in Ukraine embrace as they arrive at the Benito Juarez International Airport, after being evacuated by a Mexican Air Force plane from Bucharest, following Russia's invasion of Ukraine, in Venustiano Carranza borough of Mexico City, Mexico March 16, 2022. REUTERS/Edgard Garrido 

People wait outside an immigration office after fleeing from Ukraine to Belgium, following Russia's invasion of Ukraine, in Brussels, Belgium March 15, 2022. REUTERS/Yves Herman TPX IMAGES OF THE DAY 

A woman, who fled Russia's ongoing invasion of Ukraine sits inside a bus after she crossed the border from Ukraine to Poland, at the border checkpoint in Medyka, Poland March 15, 2022. REUTERS/Zohra Bensemra 

A woman fleeing Russia's invasion of Ukraine carries a dog as she gets on a train to Budapest departing from Zahony, Hungary March 15, 2022. REUTERS/Bernadett Szabo 

A man fixes his blanket at Dumbraveni sports arena which has been converted to a temporary shelter, after he fled Ukraine through a border crossing in Romania, following Russia's invasion of Ukraine, in Suceava, Romania March 15, 2022. REUTERS/Clodagh Kilcoyne 

A person fleeing Russia's invasion of Ukraine sits in a train to Budapest departing from Zahony, Hungary March 15, 2022. REUTERS/Bernadett Szabo 

A dog stands between suitcases as his owners flee Russia's invasion of Ukraine, at a train station in Zahony, Hungary March 15, 2022. REUTERS/Bernadett Szabo 

Emma Kaptar, 9, works on her school lessons through her phone which is propped up by a dolls house at Dumbraveni sports arena which has been converted to a temporary shelter, after she fled Ukraine through a border crossing in Romania, following Russia's invasion of Ukraine, in Suceava, Romania March 15, 2022. REUTERS/Clodagh Kilcoyne 

A teddy bear that belongs to a child who fled Russia's invasion of Ukraine, is seen at the train station in Przemysl, Poland, March 15, 2022. REUTERS/Zohra Bensemra 

Anna, 32, wife of Russian Orthodox church priest Mihail Pitnitskiy, 36 reacts after boarding a train to Budapest at the main train station, after fleeing the Russian invasion of Ukraine in Krakow, Poland, March 15, 2022. REUTERS/Fabrizio Bensch 

A volunteer gives instructions to refugees before they board a train to Berlin at the main train station, after fleeing the Russian invasion of Ukraine in Krakow, Poland, March 15, 2022. REUTERS/Fabrizio Bensch 

A man carries a child in a stroller as people fleeing Russia's invasion of Ukraine gather at a train station before departing to Poland, in Lviv, Ukraine, March 15, 2022. REUTERS/Pavlo Palamarchuk 

People fleeing Russia's invasion of Ukraine gather at a train station before departing to Poland, in Lviv, Ukraine, March 15, 2022. REUTERS/Pavlo Palamarchuk 

Ukrainian refugees from Kyiv wait for the departure of their train to Berlin at the main train station, after fleeing the Russian invasion of Ukraine in Krakow, Poland, March 15, 2022. REUTERS/Fabrizio Bensch 

Refugees sit inside a train to Berlin at the main train station, after fleeing the Russian invasion of Ukraine in Krakow, Poland, March 15, 2022. REUTERS/Fabrizio Bensch 

Kira (38) and Julia (38) from Kharkiv wait with Julia's dog, Klim, outside an immigration office after fleeing from Ukraine to Belgium, following Russia's invasion of Ukraine, in Brussels, Belgium March 15, 2022. REUTERS/Yves Herman 

People wait outside an immigration office after fleeing from Ukraine to Belgium, following Russia's invasion of Ukraine, in Brussels, Belgium March 15, 2022. REUTERS/Yves Herman 

People wait outside an immigration office after fleeing from Ukraine to Belgium, following Russia's invasion of Ukraine, in Brussels, Belgium March 15, 2022. REUTERS/Yves Herman