Russian troop build-up threatens city seen as key to seizing Ukraine's Donbas (opens original article in a new tab)

Russian troop build-up in Kostyantynivka threatens to shift control of the city, which is critical for Russia's objective of capturing Ukraine's Donbas region.

• Russian troops have infiltrated Kostyantynivka, a strategic city in eastern Ukraine, and are attempting to surround it.
• Ukrainian commanders claim the situation remains under control but acknowledge Russian forces are active within the city.
• Kostyantynivka's capture could allow Russia to advance towards Ukraine's remaining strongholds in the Donbas region.