Refugees who fled from the Russian invasion in Ukraine rest inside a temporary camp at the train station in Przemysl, Poland, March 2, 2022. REUTERS/Kai Pfaffenbach TPX IMAGES OF THE DAY 

A boy, who fled Russia's invasion of Ukraine, plays with a baby at a local resident's home, in Tiszabecs, Hungary March 2, 2022. REUTERS/Bernadett Szabo TPX IMAGES OF THE DAY 

A woman fleeing Russia's invasion of Ukraine meets with her daughter near a refugee shelter, in Tiszabecs, Hungary, March 2, 2022. REUTERS/Bernadett Szabo 

A pram left behind by Ukrainian refugees stands at the border checkpoint in Medyka, Poland, March 1, 2022. REUTERS/Kai Pfaffenbach TPX IMAGES OF THE DAY 

People fleeing from Ukraine sit near a refugee shelter, after Russia's invasion of Ukraine, in Tiszabecs, Hungary, March 2, 2022. REUTERS/Bernadett Szabo 

A child fleeing Russian invasion of Ukraine reacts as she stands outside the tent, at a temporary camp in Przemysl, Poland, March 1, 2022. REUTERS/Yara Nardi 

People fleeing from Ukraine rest near a refugee shelter, after Russia's invasion of Ukraine, in Tiszabecs, Hungary, March 2, 2022. REUTERS/Bernadett Szabo 

Refugees brave the cold in a frozen field after they fled from Ukraine because of the Russian invasion at the border checkpoint in Medyka, Poland, March 1, 2022. REUTERS/Kai Pfaffenbach 

A woman fleeing from Ukraine dresses her child at a refugee shelter, after Russia's invasion of Ukraine, in Tiszabecs, Hungary, March 2, 2022. REUTERS/Bernadett Szabo 

A girl fleeing from Ukraine sits on a bed in a refugee shelter, after Russia's invasion of Ukraine, in Tiszabecs, Hungary, March 2, 2022. REUTERS/Bernadett Szabo 

Polish firefighters hand water to people in a Ukrainian train full of refugees who fled the Russian invasion in their home country, as they arrive at the train station in Przemysl, Poland, March 2, 2022. REUTERS/Kai Pfaffenbach 

Refugees brave the cold in a frozen field after they fled from Ukraine because of the Russian invasion at the border checkpoint in Medyka, Poland, March 1, 2022. REUTERS/Kai Pfaffenbach TPX IMAGES OF THE DAY 

Refugees who fled from the Russian invasion in Ukraine rest inside a temporary camp at the train station in Przemysl, Poland, March 2, 2022. REUTERS/Kai Pfaffenbach 

A man rests in a car with a Ukrainian flag hanging from the window, as refugees who fled the Russian invasion of Ukraine gather at a temporary camp in Przemysl, Poland, March 2, 2022. REUTERS/Yara Nardi 

A refugee lies on the field after he fled from Ukraine because of the Russian invasion, at the border checkpoint in Medyka, Poland, March 1, 2022. REUTERS/Yara Nardi 

A woman wears a sign on her back as people flee the Russian invasion of Ukraine, near a border crossing in Vysne Nemecke, Slovakia March 1, 2022. REUTERS/Lukasz Glowala 

A child fleeing the Russian invasion of Ukraine holds a plush animal and looks out from a tent at a temporary camp in Przemysl, Poland, March 2, 2022. REUTERS/Yara Nardi 

A child fleeing the Russian invasion of Ukraine stands among the donated goods, at a temporary camp in Przemysl, Poland, March 1, 2022. REUTERS/Yara Nardi 

A volunteering priest stands holding a child as people fleeing the Russian invasion of Ukraine arrive in Vysne Nemecke, Slovakia, March 1, 2022. REUTERS/Lukasz Glowala 

Children sit and react after fleeing the Russian invasion of Ukraine, in Vysne Nemecke, Slovakia, March 1, 2022. REUTERS/Lukasz Glowala 

A child from Ukraine rests her head on a cuddly toy outside a refugee shelter, after fleeing Russia's invasion of Ukraine, in Beregsurany, Hungary March 1, 2022. REUTERS/Bernadett Szabo 

Refugees brave the cold in a frozen field after they fled from Ukraine because of the Russian invasion at the border checkpoint in Medyka, Poland, March 1, 2022. REUTERS/Kai Pfaffenbach 

Refugees fleeing from Ukraine arrive at Nyugati station, following Russia's invasion of Ukraine, in Budapest, Hungary, February 28, 2022. Picture taken February 28, 2022. REUTERS/Marton Monus