What happened

A Ukrainian drone struck the CDU-7 primary-processing unit at Tatneft's TANECO refinery in Nizhnekamsk, roughly 1,300km from the front line. A fire was extinguished within about 20 minutes. Russian authorities said production was not disrupted, while Reuters analysis of imagery established that the drone reached the core unit. The event marked a major expansion in the demonstrated range of Ukraine's refinery campaign.

When cited sources give different casualty, damage or spill figures for this event, they’re reported side by side above rather than merged into one number. See how confidence levels work.