Russian troops continue to battle Ukrainian defense forces and citizen soldiers for control of Kyiv, the capital, and other cities Sunday, the fourth day of Russia’s invasion of Ukraine.
In Photos: Russian Invasion of Ukraine, Feb. 27, 2022

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People fleeing the Russian invasion in Ukraine stand in line at the border crossing for entry into Poland, in Shehyni, Feb. 27, 2022.

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Family members hug as they reunite, after fleeing conflict in Ukraine, at the Medyka border crossing, in Poland, Feb. 27, 2022.

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People holding placards offer transportation to refugees from Ukraine at the Korczowa border crossing, Poland, Feb. 27, 2022.

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A woman searches through donated clothes after she and her children fled the Russian invasion in Ukraine and crossed the border in Medyka, Poland, Feb. 27, 2022.