Russia's invasion of Ukraine, Day 15 live: Kyiv 'a fortress' as Russian forces close in on capital

Kyiv mayor Vitali Klitschko says 'every street, building, checkpoint has been fortified' amid fierce fighting on the edge of the capital.

Tanks are seen being destroyed on the outskirts of Brovary, a suburb of Kyiv, in this screengrab from an undated handout video obtained by Reuters.

Welcome to live updates on Day 15 of Russia's invasion of Ukraine.