Ukraine invasion: What to know as Russian forces target Kyiv

Belongings of refugees are seen close to the Hungarian-Ukrainian border in Beregsurany, Hungary, Saturday, Feb 26, 2022. Hungary has extended legal protection to those fleeing the Russian invasion. (AP Photo/Anna Szilagyi)

Ukrainian troops inspect the site following a Russian airstrike in Kyiv, Ukraine, Saturday, Feb. 26, 2022. (AP Photo/Vadim Ghirda)

Police officers and reporters stand near an apartment building damaged following a rocket attack, in Kyiv, Ukraine, Saturday, Feb. 26, 2022. Russian troops stormed toward Ukraine's capital Saturday, and street fighting broke out as city officials urged residents to take shelter. (AP Photo/Emilio Morenatti)

A mother hugs her daughter at a checkpoint run by local volunteers after arriving from Ukraine, crossing the border in Beregsurany, Hungary, Saturday, Feb 26, 2022. Hungary has extended legal protection to those fleeing the Russian invasion. (AP Photo/Anna Szilagyi)

Demonstrators hold signs during a rally in protest against Russia's invasion of Ukraine in Marseille, southern France, Saturday, Feb. 26, 2022. From Tokyo to London to Taipei, Ukrainians living abroad and hundreds of protesters have turned out on the streets to join anti-war rallies spreading around the world as Russia's troops pressed toward Ukraine's capital. (AP Photo/Daniel Cole)

Police detain a demonstrator during an action against Russia's attack on Ukraine in St. Petersburg, Russia, Saturday, Feb. 26, 2022. Protests against the Russian invasion of Ukraine resumed on Saturday evening, with people taking to the streets of Moscow and St. Petersburg for the third straight day despite mass arrests. OVD-Info rights group reported that at least 325 people were detained in 26 Russian cities on Saturday in antiwar protests, nearly half of them in Moscow. (AP Photo/Dmitri Lovetsky)

At the start of the match, the players of both teams hold a Ukrainian flag with the inscription "Stop War. We against war." prior the Bundesliga soccer match between Greuther Fuerth and 1. FC Cologne in Fuerth, Germany, Saturday, Feb. 26, 2022. (Daniel Karmann/dpa via AP)

Ukrainian troops inspect the site following a Russian airstrike in Kyiv, Ukraine, Saturday, Feb. 26, 2022. (AP Photo/Vadim Ghirda)

A soldier walks along Ukrainian armored vehicles blocking a street in Kyiv, Ukraine, Saturday, Feb. 26, 2022. Russian troops stormed toward Ukraine's capital Saturday, and street fighting broke out as city officials urged residents to take shelter. (AP Photo/Efrem Lukatsky)

A child looks through a window of a bus carrying refugees fleeing the conflict from neighboring Ukraine in the border town of Przemysl, Poland, Saturday, Feb. 26, 2022. (AP Photo/Petr David Josek)

Civil defense personnel man a checkpoint in Kyiv, Ukraine, Saturday, Feb. 26, 2022. (AP Photo/Emilio Morenatti)

Hungarian Prime Minister, Viktor Orban talks with the press during one of his visits of the border stations of his country with Ukraine, in Beregsurany, Hungary, Saturday, Feb 26, 2022. Hungary has extended legal protection to those fleeing the Russian invasion. (AP Photo/Anna Szilagyi)

A boy waits next to a checkpoint run by local volunteers after arriving from Ukraine, crossing the border in Beregsurany, Hungary, Saturday, Feb 26, 2022. Hungary has extended legal protection to those fleeing the Russian invasion. (AP Photo/Anna Szilagyi)

A girl stands next to her family and dogs after arriving from Ukraine, crossing the border in Beregsurany, Hungary, Saturday, Feb 26, 2022. Hungary has extended legal protection to those fleeing the Russian invasion. (AP Photo/Anna Szilagyi)

A protestor holds a placard at a small demonstration held by Ukrainians, Russians, and Kenyans against Russia's invasion of Ukraine, in front of the Russian embassy in Nairobi, Kenya, Saturday, Feb. 26, 2022. Russian troops closed in on Ukraine's capital as explosions and street fighting sent Kyiv residents seeking shelter or fleeing the city. (AP Photo)

People hold Ukrainian flags in front of the Ukrainian Embassy to show their support for the people of Ukraine after Russian invasion of Ukraine, in Tehran, Iran, Saturday, Feb. 26, 2022. (AP Photo)

People gather in Times Square to denounce the Russian invasion of Ukraine on Saturday, Feb. 26, 2022, in New York. (AP Photo/Brittainy Newman)

A demonstrator holds a poster show Russian President Vladimir Putin during a rally in protest against Russia's invasion of Ukraine, Saturday, Feb. 26, 2022 in Paris. From Tokyo to London to Taipei, Ukrainians living abroad and hundreds of protesters have turned out on the streets to join anti-war rallies spreading around the world as Russia's troops pressed toward Ukraine's capital. (AP Photo/Adrienne Surprenant)

FILE - Protesters in support of Ukraine gather at the Philadelphia City Hall in Philadelphia on Friday, Feb. 25, 2022. Ukrainians in the United States are praying for friends and family, donating money and supplies, and attending demonstrations. (Jose F. Moreno/The Philadelphia Inquirer via AP, File)

Demonstrators gather during a rally in protest against Russia's invasion of Ukraine, Saturday, Feb. 26, 2022 in Paris. From Tokyo to London to Taipei, Ukrainians living abroad and hundreds of protesters have turned out on the streets to join anti-war rallies spreading around the world as Russia's troops pressed toward Ukraine's capital. (AP Photo/Adrienne Surprenant)

Demonstrators hold posters during a rally in protest against Russia's invasion of Ukraine, Saturday, Feb. 26, 2022 in Paris. From Tokyo to London to Taipei, Ukrainians living abroad and hundreds of protesters have turned out on the streets to join anti-war rallies spreading around the world as Russia's troops pressed toward Ukraine's capital. (AP Photo/Adrienne Surprenant)

Pro-Ukraine activists demonstrate outside the Consular Section of the Russian Embassy in London, Saturday, Feb. 26, 2022. Russian troops stormed toward Ukraine's capital Saturday, and street fighting broke out as city officials urged residents to take shelter. (AP Photo/David Cliff)

Pro-Ukraine activists demonstrate outside the Consular Section of the Russian Embassy in London, Saturday, Feb. 26, 2022. Russian troops stormed toward Ukraine's capital Saturday, and street fighting broke out as city officials urged residents to take shelter. (AP Photo/David Cliff)

Protestors hold a placard at a small demonstration held by Ukrainians, Russians, and Kenyans against Russia's invasion of Ukraine, in front of the Russian embassy in Nairobi, Kenya, Saturday, Feb. 26, 2022. Russian troops are closing in on Ukraine's capital as explosions and street fighting sent Kyiv residents seeking shelter or fleeing the city. (AP Photo)

Denys Samokha, a native of Ukraine who now lives in Aurora, Colo., holds up placard during a protest against the invasion of the Ukraine, outside the State Capitol Saturday, Feb. 26, 2022, in Denver. (AP Photo/David Zalubowski)

Hungarian Prime Minister, Viktor Orban visits the border stations of his country with Ukraine in Beregsurany, Hungary, Saturday, Feb 26, 2022. Hungary has extended legal protection to those fleeing the Russian invasion. (AP Photo/Anna Szilagyi)