Russia Claims Capture of Kostiantynivka in Eastern Ukraine's Donetsk Region

On July 3, 2026, Russia claimed full control of Kostiantynivka, a strategic Ukrainian stronghold in the Donetsk region. The battle for the city of 78,000 pre-war residents has raged since late 2025. While Russia released footage of flags raised in the city, Ukraine did not immediately comment, and the claim remains unverified. Capturing Kostiantynivka would open the path to Kramatorsk and Sloviansk, advancing Moscow's goal to seize the entire Donetsk region.

Kostiantynivka capture claim

• ▪Russia claimed on July 3, 2026, that its forces had completely captured the eastern Ukrainian city of Kostiantynivka
• ▪Ukraine's military did not immediately respond to Russia's claim of capturing Kostiantynivka, which could not be independently verified
• ▪The Russian Defence Ministry published media on Telegram showing Russian troops raising Russian flags at multiple locations across Kostiantynivka

Donetsk region military campaign

• ▪The battle for Kostiantynivka has been ongoing since late 2025, representing the main Russian effort on a 1,000-kilometre front
• ▪General Valery Gerasimov stated that Russia's southern group of forces continues to advance across the Donetsk region

Russian official announcements

• ▪Kremlin spokesman Dmitry Peskov stated on July 3, 2026, that Russian forces control the entire Lugansk region in eastern Ukraine
• ▪Kremlin spokesman Dmitry Peskov announced that President Vladimir Putin visited a military command post to receive a general staff report

Ukrainian defensive network

• ▪Kostiantynivka had approximately 78,000 inhabitants before the war and has served as a critical hub in Ukraine's eastern defense strategy
• ▪Kostiantynivka is a key stronghold on the road leading to Kramatorsk and Sloviansk, the last major Donbas cities under Ukrainian control

Donetsk annexation context

• ▪Russia continues military efforts to capture the remaining Ukrainian-held cities in Donetsk, as Russia lacks full military control of the region
• ▪Russia declared the Donetsk region part of its territory in 2022 following widely rejected annexation claims