People carry an elderly woman as they leave Irpin, on the outskirts of Kyiv, on Tuesday. Demands for ways to safely evacuate civilians have surged along with intensifying shelling by Russian forces.

Ukrainians crowd under a destroyed bridge as they try to flee crossing the Irpin river on the outskirts of Kyiv on Tuesday.

Ukrainians cross an improvised path under a destroyed bridge while fleeing Irpin, in the outskirts of Kyiv, Ukraine, on Tuesday.

An elderly woman is coated in snow as she sits in a wheelchair after being evacuated from Irpin, on the outskirts of Kyiv, Ukraine, on Tuesday.

A woman sits on a cot in a shelter for displaced Ukrainians in a school gymnasium in Przemysl, Poland, on Tuesday. U.N. officials said Tuesday that the Russian onslaught has forced more than 2 million people to flee Ukraine.

A Ukrainian serviceman walks past the vertical tail fin of a Russian Su-34 bomber embedded in a damaged building in Kharkiv, Ukraine, on Tuesday.

A woman pauses after fleeing Irpin, on the outskirts of Kyiv, Ukraine, on Tuesday. Efforts to put in place cease-fires along humanitarian corridors have repeatedly failed as Russia continues shelling.

People walk under a destroyed bridge while fleeing Irpin, on the outskirts of Kyiv, Ukraine, on Tuesday.

A man stands atop a destroyed bridge in Irpin, on the outskirts of Kyiv, Ukraine, on Tuesday.

In this image from video provided on Tuesday by the Ukrainian Presidential Press Office and posted on Instagram, Ukrainian President Volodymyr Zelenskyy winks as he speaks in Kyiv, Ukraine.

A woman sits on a bench wrapped in a blanket in a subway station turned into a shelter in Kyiv, Ukraine, on Tuesday.

A children's playground is seen in front of an apartment building hit by shelling in Kharkiv, Ukraine, on Tuesday.

People fleeing Ukraine, wait outside a humanitarian aid center in Przemysl, Poland, on Tuesday. U.N. officials said Tuesday that the Russian onslaught has forced more than 2 million people to flee Ukraine.

Three generations of women from left, Svetlana, Lisa and Ludmilla ,who fled from Odessa, Ukraine, sit at the border crossing in Kroscienko, Poland, on Tuesday. U.N. officials said Tuesday that the Russian onslaught has forced 2 million people to flee Ukraine.

Svetlana, who is 76 years old and who has fled from Odessa, Ukraine, sits at the border crossing in Kroscienko, Poland, on Tuesday.

Ukrainian President Volodymyr Zelensky is displayed on the screen as he addresses British lawmakers in the House of Commons in London, on Tuesday. Speaking by video link, the Ukrainian leader urged the U.K. to increase sanctions on Russia, to recognize Russia as “a terrorist country” and to keep Ukraine’s skies safe. He was given a standing ovation by members from all parties in the House of Commons.

An elderly woman is carried in a shopping cart after being evacuated from Irpin, on the outskirts of Kyiv, Ukraine, on Tuesday.

A girl sits in an improvised bomb shelter in Mariupol, Ukraine, on Monday.

Women and children fleeing from Ukraine arrive at the border crossing in Medyka, Poland, Poland, on Tuesday.

A mother and her child fleeing Ukraine, wait to board a bus at the border crossing in Medyka, Poland, on Tuesday. Russia's invasion of Ukraine has set off the largest mass migration in Europe in decades.

A man carries an elderly woman as people continue to leave Irpin, on the outskirts of Kyiv, Ukraine, on Tuesday.

A Belarusian volunteer receives military training at the Belarusian Company base in Kyiv, Ukraine, on Tuesday. The government of Belarus is aiding Russia in its invasion of neighboring Ukraine, but hundreds of Belarus emigrants and citizens have arrived in Ukraine to help the Ukrainian army fight against Russian invaders.

A Belarusian volunteer speaks by phone as he receives military training at the Belarusian Company base in Kyiv, Ukraine, on Tuesday. Hundreds of Belarus emigrants and citizens have arrived in Ukraine to help the Ukrainian army fight against Russian invaders, even though Russia is being aided by the Belarusian government.

Ukrainian refugees queue for food in the welcome area after their arrival at the main train station in Berlin, Germany, on Tuesday.

People sit in a bomb shelter in in Mariupol, Ukraine, on Tuesday.

A nun comforts a child at a temporary shelter, for displaced persons fleeing Ukraine, in Przemysl, Poland, Tuesday, March 8, 2022. U.N. officials said Tuesday that the Russian onslaught has forced more than 2 million people to flee Ukraine. (AP Photo/Daniel Cole)