In pictures: Russia invades Ukraine

  • Ukrainian tanks move into the city, after Russian President Vladimir Putin authorized a military operation in eastern Ukraine, in Mariupol, February 24. REUTERS/Carlos Barria

    Ukrainian tanks move into the city, after Russian President Vladimir Putin authorized a military operation in eastern Ukraine, in Mariupol, February 24. REUTERS/Carlos Barria

  • Police officers inspect the remains of a missile that fell in the street in Kyiv, Ukraine, February 24. REUTERS/Valentyn Ogirenko

    Police officers inspect the remains of a missile that fell in the street in Kyiv, Ukraine, February 24. REUTERS/Valentyn Ogirenko

  • Fire is seen coming out of a military installation near the airport in eastern Ukraine, in Mariupol, February 24. REUTERS/Carlos Barria

    Fire is seen coming out of a military installation near the airport in eastern Ukraine, in Mariupol, February 24. REUTERS/Carlos Barria

  • Cars drive towards the exit of the city in Kyiv, Ukraine, February 24. REUTERS/Valentyn Ogirenko

    Cars drive towards the exit of the city in Kyiv, Ukraine, February 24. REUTERS/Valentyn Ogirenko

  • Service members of the Ukrainian armed forces take position near the port of Mariupol, February 24. REUTERS/Carlos Barria

    Service members of the Ukrainian armed forces take position near the port of Mariupol, February 24. REUTERS/Carlos Barria

  • People take shelter in a subway station in Kyiv, Ukraine, February 24. REUTERS/Valentyn Ogirenko

    People take shelter in a subway station in Kyiv, Ukraine, February 24. REUTERS/Valentyn Ogirenko

  • A view shows a building of a military base, which, according to the State Emergency Service of Ukraine, was damaged by fire in the town of Brovary, near Kyiv, Ukraine, February 24. State Emergency Service of Ukraine/via REUTERS

    A view shows a building of a military base, which, according to the State Emergency Service of Ukraine, was damaged by fire in the town of Brovary, near Kyiv, Ukraine, February 24. State Emergency Service of Ukraine/via REUTERS

  • An American woman cries after crossing the border and fleeing the violence in Ukraine, in Medyka, Poland, February 24. REUTERS/Bryan Woolston

    An American woman cries after crossing the border and fleeing the violence in Ukraine, in Medyka, Poland, February 24. REUTERS/Bryan Woolston

  • A local resident sits in a car as they pack to leave the city in Mariupol, Ukraine, February 24. REUTERS/Carlos Barria

    A local resident sits in a car as they pack to leave the city in Mariupol, Ukraine, February 24. REUTERS/Carlos Barria

  • Military vehicles are seen on a street on the outskirts of the separatist-controlled city of Donetsk, Ukraine, February 23. REUTERS/Alexander Ermochenko

    Military vehicles are seen on a street on the outskirts of the separatist-controlled city of Donetsk, Ukraine, February 23. REUTERS/Alexander Ermochenko

  • Ukrainian tanks move into the city in Mariupol, February 24. REUTERS/Carlos Barria

    Ukrainian tanks move into the city in Mariupol, February 24. REUTERS/Carlos Barria

  • People wait at a bus station to travel to western parts of the country, in Kyiv, Ukraine, February 24. REUTERS/Umit Bektas

    People wait at a bus station to travel to western parts of the country, in Kyiv, Ukraine, February 24. REUTERS/Umit Bektas

  • Two women react after crossing the Polish border, after fleeing Ukraine, in Medyka, Poland, February 24. REUTERS/Bryan Woolston

    Two women react after crossing the Polish border, after fleeing Ukraine, in Medyka, Poland, February 24. REUTERS/Bryan Woolston

  • People take shelter in a subway station in Kyiv, Ukraine, February 24. REUTERS/Valentyn Ogirenko

    People take shelter in a subway station in Kyiv, Ukraine, February 24. REUTERS/Valentyn Ogirenko