Three workers were injured when drones struck the Ust-Luga port zone in Russia's Leningrad region overnight on November 10–11.
The impacts started a fire and caused an emergency shutdown of a transformer substation.
Leningrad regional governor Alexander Drozdenko said several drones had hit the port area in Kingisepp district. He said the injured workers' lives were not in danger.
The governor’s preliminary count was 150 drones shot down over the region.
The substation supplies consumers in Kingisepp and Volosovo districts. The regional fuel and energy committee said later on November 11 that emergency restoration work was complete and power had been restored to all consumers.
Ukraine's Security Service said it carried out the attack with other defence forces. In a preliminary account, it reported damage to storage tanks, pumping stations, pipelines, and oil transshipment infrastructure.
The report named the Novatek-Ust-Luga, Ust-Luga Oil and Factor terminals and Luzhskaya railway station.
Ukraine's General Staff said five petroleum-product tanks with a combined volume of 150,000 cubic metres had been damaged. It also said that a hydrocracking unit, an air-cooling apparatus, a pumping station, and a berth used to load petroleum products onto tankers had also been struck.
NASA's Fire Information for Resource Management System detected a large fire at the port during a satellite pass. Footage also circulated online of a blaze reportedly at the oil export terminal.
Ust-Luga lies on the Gulf of Finland and also handles grain and other export cargoes. It typically handles about 700,000 barrels per day of crude oil and exported 32.9 million tonnes of petroleum products in 2025.
Repeated attacks in March forced suspensions of export operations. Crude loading resumed in early April.
An earlier drone attack caused a fire at the port on August 14.