Moscow — A major oil refinery in the southeast of the Russian capital was set on fire again after an overnight drone attack, sending thick plumes of smoke over the city and temporarily disrupting flights across Moscow-area airports.

The attack, described as one of the biggest drone strikes in recent months, hit the Moscow Oil Refinery (often referred to as a key Moscow fuel-processing site). Video footage and local reports showed large flames and heavy black smoke rising from the facility, with sooty residue reported in the surrounding area.

Russian officials said the fire was largely contained and that firefighting teams worked to extinguish remaining hot spots. Moscow Mayor Sergei Sobyanin said crews were still dealing with additional ignition points hours after the strike.

The refinery blaze also affected transport. Flight operations were temporarily halted at multiple Moscow airports while aviation authorities assessed the situation, and hundreds of arrivals and departures were delayed or cancelled.

The strike came amid Ukraine’s broader campaign against Russian energy infrastructure, which Kyiv says is meant to disrupt Russia’s ability to finance the war and to demonstrate that the conflict’s consequences are reaching the Russian capital.

## Related info (what’s known/not known) The sources attribute the attack to Ukrainian drones, but they do not provide definitive details on the exact mechanism of how the refinery was hit (e.g., what component was damaged first) beyond reporting that drones caused explosions and a sustained fire.