The Ukrainian capital is preparing for the worst with checkpoints, armed forces and sandbags in front of the mayor's office in central Kyiv.
According to the mayor, the Russian forces are not in the city right now, but there have been battles against them.
Several days into the Russian invasion, there are growing signs that Vladimir Putin's forces intend to besiege the city with fighting in all directions.
Columns of smoke mark the areas where the fighting has been most intense.
This is what a city under siege looks like.