Small groups of Russian soldiers attempt to infiltrate outskirts of Kostiantynivka in heavily industrialised Donetsk region, suggesting close-quarters assaults could follow.

Kostiantynivka is the southernmost of four key settlements forming a defensive line central to Ukraine's effort to hold the Donetsk region

Small groups of Russian soldiers attempt to infiltrate outskirts of Kostiantynivka in heavily industrialised Donetsk region, suggesting close-quarters assaults could follow.