Maps of Russia’s invasion of Ukraine

On March 9, Ukraine’s closed and to-be decommissioned Chernobyl nuclear power plant has been disconnected from the nation’s power grid by Russian forces, according the state-owned grid operator Ukrenergo.

The nuclear plant has lost all power supply prompting the use of emergency diesel generators that would only last for 48 hours. Electricity is needed for cooling, ventilation and fire extinguishing systems at the nuclear site.

Russian forces still control the Zaporizhzhia power plant in southern Ukraine.

Kyiv, which is less than 70 miles from the Belarusian border, is threatened by Russian troops approaching the capital from the north. The main threat to the city appears to be a massive Russian convoy, about 40 miles long, approaching Kyiv from the west and believed to be about 20 miles from the capital and stuck near Antonov International Airport.

Here’s where Russian oil flows

Ukrainians rush to cross to neighboring countries

Fighting throughout the country has driven more than 2 million people from Ukraine into neighboring countries, the U.N. refugee agency said. According to border police authorities, the majority of Ukrainians are fleeing to Poland.

Men ages 18 to 60 are barred from leaving the country following President Volodymyr Zelensky’s call to take up arms and defend the country against the Russian invaders.

Russia proposed Tuesday humanitarian corridors to evacuate civilians from several cities, including Mariupol and Kyiv. Out of the six routes announced, four lead to Russia or Belarus, and were rejected by Ukraine.

The Ukrainian government said Tuesday that the only agreed-upon evacuation routes were to other regions within Ukraine. So far only one corridor managed to open, from Sumy, near a Russian-held area, to Poltava, about 100 miles south.

More than two million people have left Ukraine, foreshadowing a massive humanitarian crisis

Dylan Moriarty, Artur Galocha, Joe Fox, Harry Stevens, Hannah Dormido, Laris Karklis, Lauren Tierney, Tim Meko, Simon Ducroquet, Júlia Ledur and Adrián Blanco contributed to this report.