Ukrainian drones previously attacked the Pervyy Zavod oil refinery in Kaluga Oblast on the night of 14-15 March, causing a fire and damaging equipment.

Ukrainian drones had already attacked the Pervyy Zavod (First Plant) oil refinery in Russia's Kaluga Oblast on the night of 14-15 March. At that time, a fire broke out at the facility and equipment was damaged.

Three drones hit an oil refinery in the Kaluga region, damaging the company's equipment and causing a fire

Russian air defense claimed to have shot down four drones over the Kaluga region with no casualties or damage

Ukraine has successfully targeted yet another Russian oil refinery, this time in the country's Kaluga region

On the night of March 14/15, Ukrainian drones from the main military intelligence directorate (HUR) attacked the Pervyi Zavod plant in Russia's Kaluga region, which is engaged in oil refining, a source in the HUR told the Kyiv Post. The governor of the Kaluga region, Vladislav Shapsha, said that four drones were shot down in Dzerzhinsky district at night. According to him, there were no casualties or damage to infrastructure.

On 15 March, drones attacked the Pervyi Zavod oil refinery in the Kaluga region, damaging equipment and causing a fire.