A fire has broken out at the Afipsky oil refinery in Russia's southern Krasnodar region following a drone attack, according to reports from Reuters.
Debris from the strike fell onto the premises of two facilities, with one catching fire, the agency said.
The incident underscores the persistent vulnerability of Russian energy infrastructure to cross-border strikes.
While the immediate impact on output remains unclear, any disruption at a major processing hub in the Krasnodar region can tighten regional supply chains and support benchmark crude prices.
Brent crude futures traded higher in early Asian session trading, reflecting market sensitivity to fresh supply-side risks in Russia.
The attack comes amid a broader pattern of Ukrainian strikes on Russian energy assets, which have periodically constrained refining capacity and export flows.