Ukrainian army chief says effort continues 'to destroy and dislodge' Russian forces from strategic Donetsk region city.

Heavy fighting rages in Ukraine's east, Kyiv's forces target Russian energy hubs and Russia's leader ups the ante.

The capture of Pokrovsk could unlock Russian efforts to seize the rest of the Donetsk region.

Army sources tell the BBC military intelligence special forces are being used to protect supply lines into Pokrovsk.

Ukrainian army chief says effort continues 'to destroy and dislodge' Russian forces from strategic Donetsk region city.

Ukraine military says it has improved positions in several districts, while Moscow says its troops are enclosing in on Ukrainian forces.

Escalating battle for city comes as overnight Russian drone and missile strikes kill six people, including two children