Hacked data allegedly taken from Russia’s statistics agency Rosstat indicated that 392,700 Russian death certificates recorded deaths explicitly linked to the war in Ukraine between February 2022 and the end of August 2026. The codes or descriptions cited causes such as a military operation, bombing or drones. The dataset reportedly contained more than 11 million death certificates and included information on age, residence and place of death.

The Belarusian group Cyberpartisans and the Ukrainian organization Silent Crow said they obtained the data. Bloomberg’s investigation could not definitively establish the database’s authenticity, but found no evidence that it had been forged and said the figures were broadly consistent with previously published Russian mortality data. Silent Crow estimated the number of deaths at about 450,000, noting that missing soldiers, unidentified bodies and people who later died of injuries might not be included. Rosstat confirmed it had been targeted by cyberattacks but denied that confidential data had been stolen. Russia has not published official figures for military deaths since the early months of the invasion.