In the Kaluga region, unmanned aerial vehicles attacked an oil refinery, causing a fire, according to Russian media reports. According to public reports, in the Dzerzhinskys district, not far from the Polotnyany plant station, several powerful explosions occurred around one o’clock in the morning. The work of the air defense systems was reported. Eyewitnesses reported hearing the characteristic sounds of several drones flying by, after which fire and smoke were visible in the area of the local oil depot. Attacks on Russian oil refineries Earlier tonight, reports emerged of air defense systems …