Updated March 7, 2022 at 1:51 PM ET

Claire Harbage/NPR

March 6: People arrive by train to Lviv, Ukraine.

The United Nations' refugee agency says Russia's invasion of Ukraine has already prompted more than 1.5 million people to flee the war, turning the invasion into the fastest-growing refugee crisis in Europe since World War II.

Emilio Morenatti/AP

March 5: Ukrainians crowd under a destroyed bridge as they try to flee crossing the Irpin river in the outskirts of Kyiv, Ukraine.

Russia and Ukraine held a third round of talks Monday. The Russian Defense Ministry announced it would initiate cease-fires in some Ukrainian cities to create corridors for refugees to pass safely through, but many of those led to Russia or Belarus, where the numbers of people fleeing are low.

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March 5: A Ukrainian soldier and a militia man help a fleeing family crossing the Irpin river in the outskirts of Kyiv, Ukraine.

Just 11 days into the war, Ukrainians continue to flow into Poland and other neighboring countries.

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March 4: People take cover from shelling in the city of Bucha, west of Kyiv.

The majority, more than 800,000, have crossed into Poland.

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March 5: A man lies on a camp bed in a refugee reception center at the Ukrainian-Polish border crossing in Korczowa.

Take a look.

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March 5: A woman sits while people cross a nearby destroyed bridge as they evacuate the city of Irpin, northwest of Kyiv.

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March 5: People sit in a car as as they evacuate the city of Irpin, northwest of Kyiv, during heavy shelling and bombing.

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March 5: Servicemen of the Ukrainian Military Forces prepare their equipment to repel a tank attack on a position in the Lugansk region.

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March 5: A woman is visible through the condensation on a window of an evacuation train at Kyiv central train station.

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March 5: Civilians and aid organizations help arriving refugees at the Western Railway Station after crossing the border at Zahony-Csap as they flee Ukraine in Budapest, Hungary.

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March 4: Ukrainian President Volodymyr Zelenskyy delivers a video message to the people gathered for a rally in Romerberg Square in Frankfurt, Germany.

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March 4: People lie on the floor of a hospital during shelling by Russian forces in Mariupol, Ukraine.

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March 4: This general view shows destroyed Russian armored vehicles in the city of Bucha, west of Kyiv.

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March 4: Smoke rises from a bombed warehouse in the town of Stoyanka, west of Kyiv.

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