In photos: Ukraine's growing humanitarian crisis
The United Nations warns that Ukraine is facing a growing humanitarian crisis, with reports that tens of thousands of Ukrainians are without food, water and heat during the Russian military's deadly assault on the country.
The big picture: Over 2 million refugees have fled Ukraine since the Putin-ordered invasion began two weeks ago. Many more remain trapped in the country. Ukrainian officials have accused Russian forces of shelling humanitarian corridors, despite Kremlin pledges to hold fire and enable civilians to leave.
Go deeper: The latest on the Russia-Ukraine crisis
Editor's note: This article has been updated with more images.