The Guardian reports on leaked Rosstat death records suggesting more than 400,000 Russians — 412,576 by certificates explicitly linked to the war — have been killed in Ukraine since the 2022 invasion, data obtained by the hacker groups Cyber Partisans and Silent Crow; Russia confirmed the hack but denies sensitive information leaked. Janis Kluge says the toll is probably closer to 500,000, and the data show losses falling hardest on poorer regions like Buryatia and Tuva, with US-brokered peace talks due in Abu Dhabi.