In war ravaged Ukraine, the Russian military operation has trapped people inside besieged cities that are running low on food, water and medicine amid the biggest ground war in Europe since World War II.
Previous attempts to lead civilians to safety have crumbled with renewed attacks. However, video posted by Ukrainian officials showed buses packed with people moving along a snowy road from the eastern city of Sumy and others leaving the besieged post of Mariupol. It was not clear how long the effort would last. The officials said the exodus of refugees from the country reached 2 million.