Ukrainian forces have carried out their first confirmed attack on Russian oil infrastructure in the Caspian Sea, striking a major offshore production platform operated by Lukoil and forcing a suspension of operations, according to Ukrainian officials.

The Security Service of Ukraine (SBU) deployed long-range drones against the Vladimir Filanovsky oil field, one of Russia’s largest offshore energy assets, resulting in multiple confirmed impacts on the platform. Ukrainian sources report that oil and gas extraction from more than 20 wells tied to the installation has been halted following the strike.

The Filanovsky field, situated in the northern Caspian Sea and operated by Lukoil-Nizhnevolzhskneft, contains estimated reserves of approximately 129 million tonnes of crude oil and 30 billion cubic metres of natural gas. Before the attack, the platform played a significant role in Russia’s offshore production and export network.

Moscow has not issued an official response, while Ukrainian officials framed the operation as part of a broader strategy to disrupt Russian energy revenues that support its military campaign. The incident underscores Kyiv’s increasing long-range operational capability and marks a notable escalation in the wider conflict.

Authorities also advised all commercial vessels operating near the affected area to remain alert and exercise heightened caution due to potential follow-on risks and security uncertainties in the region.