Russian President Vladimir Putin claimed that Russian forces have taken full control of Kostyantynivka (Konstantinovka) in the Donetsk region of Ukraine. Speaking at a meeting with military officials, Putin presented the capture of Kostyantynivka as the "first, but very important, stage" in dismantling Ukrainian defenses in the Sloviansk-Kramatorsk-Kostyantynivka fortified area. He suggested that Kramatorsk is now effectively under Russian control and that the ultimate goal is the complete "liberation of the entire DPR territory." Kremlin spokesman Dmitry Peskov also reiterated this claim, stating that "Konstantinovka has been completely taken."

Despite Russia's assertions, Ukraine has explicitly denied the loss of Kostyantynivka. Ukrainian military officials confirmed that fighting is ongoing in and around the settlement, refuting the Russian claims of complete control. Yurii Madiar, deputy commander of the 19th Army Corps of the Armed Forces of Ukraine, previously reported successful clearance operations south of Kostyantynivka, indicating Ukrainian presence and resistance. Maps from Ukrainian military publics also show Russian troops near the settlement but not having fully captured it.

Independent analysis, such as that provided by the DeepState map, does not corroborate Russia's claim of Kostyantynivka's capture. The American Institute for the Study of War (ISW) had previously warned about Russia's concentration of approximately 11,000 troops in the Kostyantynivka–Druzhkivka tactical area, but also cautioned that Russia might employ AI-generated videos to spread misinformation about its alleged successes. The conflicting accounts highlight a common characteristic of reporting in this conflict, where real-time verification of battlefield developments remains challenging and the full picture often takes days to emerge.

Putin emphasized the strategic importance of Kostyantynivka, describing it as a key transportation hub and industrial center. Its location at the junction of supply routes for Ukrainian positions in central Donetsk makes its control significant for logistical operations. Russia aims to sever these supply lines and advance towards Kramatorsk and Sloviansk, which represent the last major Ukrainian-held population centers and defensive strongholds in the Donetsk region. The duration of this next phase, and whether Russian forces can sustain an immediate advance, remains uncertain.