The fight for Kyiv
Russian forces arrived near Obolon on the outskirts of Kyiv on Friday, but so far have not advanced into the centre of the capital.
The Ukrainian military says Russian troops have repeatedly tried to storm the outskirts of the capital without success.
Russian troops around Ukraine
Russia is now in full control of significant parts of Ukraine's territory.
After Ukraine's air defences and other military infrastructure came under attack on Thursday, columns of tanks moved into position, backed up by artillery and air power.
