Svitlana Toryanik, 81, from Kharkiv who fled Russia's ongoing invasion of Ukraine, plays crosswords as she lies down at the gym turned-shelter in Lviv, Ukraine March 19, 2022. REUTERS/Zohra Bensemra 

A woman sits in a tent in a metro station that is being used as a bomb shelter, as Russia's attack on Ukraine continues, in Kyiv, Ukraine, March 18, 2022. REUTERS/Thomas Peter 

A man who fled Russia's ongoing invasion of Ukraine, waits for his family to board the train heading to Poland, at the train station in Lviv, Ukraine March 19, 2022. REUTERS/Zohra Bensemra 

A woman is wrapped in a blanket in a subway train that is stationary in a metro station which is being used as a bomb shelter, as Russia's attack on Ukraine continues, in Kyiv, Ukraine, March 18, 2022. REUTERS/Thomas Peter 

A view shows a line of cars near blocks of flats destroyed during Ukraine-Russia conflict, as evacuees leave the besieged port city of Mariupol, Ukraine March 17, 2022. REUTERS/Alexander Ermochenko 

Vladimir Galinkov packs his belongings to evacuate his damaged apartment after his residential building was hit by an intercepted missile, as Russia's invasion of Ukraine continues, in Kyiv, Ukraine March 17, 2022. REUTERS/Thomas Peter TPX IMAGES OF THE DAY 

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 local resident who seeks refuge in the basement of a building during Ukraine-Russia conflict is seen in the besieged southern port city of Mariupol, Ukraine March 18, 2022. REUTERS/Alexander Ermochenko 

Evacuees fleeing Ukraine-Russia conflict walk out of the besieged southern port city of Mariupol, Ukraine March 17, 2022. REUTERS/Alexander Ermochenko 

A woman uses her mobile phone as she sits inside a bus after she crossed the border from Ukraine to Poland, amid Russia's invasion of Ukraine, at the border checkpoint in Medyka, Poland, March 17, 2022. REUTERS/Zohra Bensemra TPX IMAGES OF THE DAY 

Evacuees fleeing Ukraine-Russia conflict sit in the body of a cargo vehicle while waiting in a line to leave the besieged southern port city of Mariupol, Ukraine March 17, 2022. REUTERS/Alexander Ermochenko 

Men pool carts while walking past a line of cars with evacuees, who leave the besieged southern port city of Mariupol, Ukraine March 17, 2022. REUTERS/Alexander Ermochenko 

A Ukrainian woman and her family sit in a taxi with the colours of the Ukrainian flag upon arriving in Madrid with a group of Spanish taxi drivers who drove to Poland to support the mass evacuation of refugees, in Madrid, Spain, March 17, 2022. REUTERS/Susana Vera REFILE - QUALITY REPEAT TPX IMAGES OF THE DAY 

Yulia Vigrinyak, from Mykolaiv, cries as she holds her dog, following their arrival by ferry after fleeing from Russia's invasion of Ukraine, at the Isaccea-Orlivka border crossing, Romania, March 14, 2022. REUTERS/Stoyan Nenov TPX IMAGES OF THE DAY 

People walk after crossing Polish border, amid Russia's invasion of Ukraine, at the border checkpoint in Medyka, Poland, March 19, 2022. REUTERS/Kacper Pempel TPX IMAGES OF THE DAY 

Evacuees fleeing Ukraine-Russia conflict walk out of the besieged southern port city of Mariupol, Ukraine March 17, 2022. REUTERS/Alexander Ermochenko 

A conductor looks at the train tracks as refugees fleeing Ukraine to Romania board trains, following Russia's invasion of Ukraine, in Suceava, Romania, March 15, 2022. REUTERS/Clodagh Kilcoyne TPX IMAGES OF THE DAY 

Local residents, who seek refuge in the basement of a building during Ukraine-Russia conflict, are seen in the besieged southern port city of Mariupol, Ukraine March 17, 2022. REUTERS/Alexander Ermochenko 

Evacuees fleeing Ukraine-Russia conflict sit in a damaged car as they wait in a line to leave the besieged southern port city of Mariupol, Ukraine March 17, 2022. REUTERS/Alexander Ermochenko 

Local residents, who seek refuge in the basement of a building during Ukraine-Russia conflict, are seen in the besieged southern port city of Mariupol, Ukraine March 17, 2022. REUTERS/Alexander Ermochenko 

A Ukrainian refugee cries as she says goodbye to a family member traveling to Budapest after arriving from the border with Ukraine fleeing their country following the Russian invasion, at North Railway Station in Bucharest, Romania, March 14, 2022. REUTERS/Edgard Garrido TPX IMAGES OF THE DAY 

Lisa, 21, kisses her daughter Lea, 6 months old, from Sloviansk, Donetsk Oblast, while playing at temporary accommodation after fleeing the Russian invasion of Ukraine, in Rzeszow, Poland, March 16, 2022. REUTERS/Fabrizio Bensch TPX IMAGES OF THE DAY 

Evacuees fleeing Ukraine-Russia conflict sit in the body of a cargo vehicle while waiting in a line to leave the besieged southern port city of Mariupol, Ukraine March 17, 2022. REUTERS/Alexander Ermochenko