1 million flee Ukraine as Russian assault hits key cities and fuels exodus

More than 1 million people have fled Ukraine in a rapid exodus after a week of war, as Russia’s military bombarded key cities across the country in an effort to overcome staunch resistance to the invasion.

The conflict has fueled a growing humanitarian crisis in Europe and left those who have remained in Ukraine facing an intensifying assault from the air and ground.

But the mileslong Russian military convoy threatening the Ukrainian capital has made little progress over the last three days. Russian forces' northern advance has struggled to overcome a fierce Ukrainian defense and its own logistical issues. They appear to have had more success in the south, with one key port city all but under Russian control and another struggling to hold out under siege.