Ukraine invasion: What to know as Russian forces target Kyiv

In this handout photo taken from video released by Ukrainian Police Department Press Service released on Friday, Feb. 25, 2022, firefighters inspect the damage at a building following a rocket attack on the city of Kyiv, Ukraine, Friday, Feb. 25, 2022. Russia is pressing its invasion of Ukraine to the outskirts of the capital. That comes a day after it unleashed airstrikes on cities and military bases and sent in troops and tanks from three sides. (Ukrainian Police Department Press Service via AP)

A man walks past a building damaged following a rocket attack the city of Kyiv, Ukraine, Friday, Feb. 25, 2022. (AP Photo/Emilio Morenatti)

Natali Sevriukova reacts next to her house following a rocket attack the city of Kyiv, Ukraine, Friday, Feb. 25, 2022. (AP Photo/Emilio Morenatti)

In this handout photo released by Russian Foreign Ministry Press Service, Russian Foreign Minister Sergey Lavrov speaks during a meeting with top envoys from the separatist regions in eastern Ukraine, Vladislav Deinego of the Luhansk People's Republic and Sergei Peresada, of the Donetsk People's Republic (DPR), in Moscow, Russia, Friday, Feb. 25, 2022. Russia recognized the regions as independent states and then pointed at their request for military assistance to invade Ukraine. (Russian Foreign Ministry Press Service via AP)

People take shelter at a building basement while the sirens sound announcing new attacks in the city of Kyiv, Ukraine, Friday, Feb. 25, 2022. (AP Photo/Emilio Morenatti)

NATO Secretary General Jens Stoltenberg speaks during a media conference after convening an online NATO leaders summit at NATO headquarters in Brussels, Friday, Feb. 25, 2022. U.S. President Joe Biden and his NATO counterparts will seek Friday to reassure member countries on the alliance's eastern flank that their security is guaranteed as Russia's large-scale invasion of Ukraine closes in on the capital Kyiv. (AP Photo/Olivier Matthys)

People rest in the Kyiv subway, using it as a shelter in Kyiv, Ukraine, Friday, Feb. 25, 2022. Russia is pressing its invasion of Ukraine to the outskirts of the capital after unleashing airstrikes on cities and military bases and sending in troops and tanks from three sides. (AP Photo/Efrem Lukatsky)

Russian President Vladimir Putin enters a hall to chair a Security Council meeting in Moscow, Russia, Friday, Feb. 25, 2022. (Alexei Nikolsky, Sputnik, Kremlin Pool Photo via AP)

A driver with her belongings fleeing the conflict from neighboring Ukraine, arrives at the border crossing in Medyka, southeastern Poland, on Friday, Feb. 25, 2022. U.N. officials said that 100,000 people were believed to have left their homes and estimated up to 4 million could flee if the fighting escalates.(AP Photo/Czarek Sokolowski)

A woman pushes a baby stroller after crossing the border from Ukraine at the Romanian-Ukrainian border, in Siret, Romania, Friday, Feb. 25, 2022. Thousands of Ukrainians are fleeing from war by crossing their borders to the west in search of safety. They left their country as Russia pounded their capital and other cities with airstrikes for a second day on Friday. Cars were backed up for several kilometers (miles) at some border crossings as authorities in Poland, Slovakia, Hungary, Romania and Moldova mobilized to receive them, offering them shelter, food and legal help. (AP Photo/Andreea Alexandru)

Flowers and candles were left in front of the Ukrainian Embassy in Copenhagen, Friday, Feb. 25 2022. Condemnation of Russian invasion of Ukraine, from the highest levels to common people reactions, is flourishing all over the world. (Claus Bech/Ritzau Scanpix via AP)

People fleeing the conflict from neighboring Ukraine, arrive at the border crossing in Medyka, southeastern Poland, on Friday, Feb. 25, 2022. U.N. officials said that 100,000 people were believed to have left their homes and estimated up to 4 million could flee if the fighting escalates.(AP Photo/Czarek Sokolowski)

People fleeing the conflict from neighboring Ukraine meet with members of their family at the border crossing in Medyka, southeastern Poland, on Friday, Feb. 25, 2022. U.N. officials said that 100,000 people were believed to have left their homes and estimated up to 4 million could flee if the fighting escalates. (AP Photo/Czarek Sokolowski)

The body of a serviceman is coated in snow next to a destroyed Russian military multiple rocket launcher vehicle on the outskirts of Kharkiv, Ukraine, Friday, Feb. 25, 2022. Russian troops bore down on Ukraine's capital Friday, with gunfire and explosions resonating ever closer to the government quarter, in an invasion of a democratic country that has fueled fears of wider war in Europe and triggered worldwide efforts to make Russia stop. (AP Photo/Vadim Ghirda)