Ukrainian drone attacks on Russia intensify, with Russian authorities reporting that a strike sets fire to a major oil refinery in the south of the country. The incident is described as damaging refinery facilities and sparking a large fire. Russian officials also say the attack results in casualties, with at least two people killed, though they do not specify further details in the reports provided. The accounts attribute the strike to Ukraine’s use of drones and frame it as part of a broader escalation in drone activity. No information is provided in the available summaries about the refinery’s exact location, the extent of the damage, disruption to fuel supplies, or any immediate response measures beyond the fire. The reports rely on statements from Russian authorities and do not include an independent verification or comment from Ukrainian officials in the cited material. Overall, the common elements across sources are the claimed Ukrainian drone attack, the fire at a southern oil refinery, and the reported deaths.