Ukrainian forces have advanced into areas north of Kyiv as Ukrainian President Volodymyr Zelensky accuses departing Russian soldiers of leaving behind mines.
Ukrainian presidential adviser Okeksiy Arestovych said Ukrainian troops had retaken more than 30 towns and villages in the region since Russia announced this week it would scale down operations around the capital to focus on battles in the east.
British military intelligence said Russian troops had abandoned Hostomel airport in a northwestern suburb of the capital, where there had been fighting since the first day of the invasion.
In the east, a Red Cross convoy was again seeking to evacuate civilians from the besieged port of Mariupol after abandoning an attempt on Friday because of a lack of security guarantees. But that renewed mission was not expected to reach the port until at least Sunday.
Russia has depicted its drawdown of forces near Kyiv as a goodwill gesture in peace negotiations. Ukraine and its allies say Russian forces have been forced to regroup after suffering heavy losses.
"In the north of our country, the invaders are leaving. It is slow but noticeable. In some places they are being kicked out with fighting. Elsewhere they're abandoning the positions themselves," Zelensky said in a video address released on Saturday.
"They are mining all this territory. Houses are mined, equipment is mined, even the bodies of dead people," he said, without citing evidence.
Russia's defence ministry did not reply to a request for comment on the allegations.
Reuters could not independently verify the allegations.
In the village of Nova Basan, northeast of Kyiv, which was among those retaken by Ukrainian forces, the body of a man lay next to the carcass of a car. A woman wept as men brought a coffin to remove the body.
The village showed signs of heavy fighting, with collapsed buildings and the wreckage of tanks and armoured vehicles strewn around. Another dead body, apparently that of a Russian soldier, lay near a destroyed armoured personnel carrier.