Russia has reported an overnight drone attack on an oil refinery in the Kaluga region.
That's according to the Russian Telegram channel SHOT, Ukrinform reports.
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"Explosions were heard in the Pervy Zavod [oil refinery] area. According to preliminary information, air defenses were in action. According to eyewitnesses, at around one o'clock in the early morning, several powerful explosions were heard in the Dzerzhinsky district, not far from the Polotnyany Zavod station," the post reads.
