The frontlines of the Russia-Ukraine conflict have barely moved in recent years, with the Russians making minimal gains. Pokrovsk is in the Donetsk region - a key stronghold and logistics hub for the Ukrainians. After an offensive lasting more than a year, Moscow now has the town almost encircled with 150,000 troops. The Kremlin hopes that capturing the town will let them then take Kramatorsk and Sloviansk. The Russian advance may be painfully slow, but the pain it inflicts is evident, as Ukrain

Undated video circulating on social media shows Russian troops moving through dense fog in Pokrovsk as Moscow steps up efforts to reinforce positions. Ukraine says around 300 Russian soldiers are in the town and are trying to push north to encircle the area. | Al Jazeera English