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

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.

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