The Ukrainian army says armed forces are engaged in fighting in the outskirts of the capital Kyiv in Dymer and Ivankiv, where a large number of Russian armoured vehicles have advanced.
A post on the official Facebook page of the Ukrainian armed forces said forces "continued to resist" Russian forces northwest of the capital.
The post added that troops had destroyed a bridge on the border of the Teteriv River to impede the further advancement of Russian forces.
It added that troops were still holding on to an airfield on the outskirts of the city - which could become a springboard for the Russian army into Kyiv if Russian troops were to seize it.