What happened

Ukrainian drones struck Rosneft's Novokuibyshevsk oil refinery in Samara region during an overnight attack wave, and a major fire was reported at the site. Ukrainian President Volodymyr Zelenskyy and Ukraine's military acknowledged the refinery strike, while Samara Governor Vyacheslav Fedorishchev confirmed that an industrial facility was damaged without naming it. Public reporting did not establish which refinery units were hit, whether processing stopped, the fire's verified area, casualties at the refinery or a restoration timeline. This is a distinct repeat-strike entry for the same facility as the documented 18 April 2026 attack and processing halt. The same wave also hit an Ozon logistics complex in Chapayevsk; that non-energy target is contextual only and is not mapped here.

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.