In Engels, explosions were heard during the night of March 20. Authorities claim that drones were allegedly shot down, according to the Telegram channel SHOT and the governor of the Saratov region, Roman Busargin. According to a source, up to 4 explosions were heard. Preliminarily, it is claimed that the air defense system was operational. “2 to 4 loud explosions were heard, causing windows to shake in their frames. According to preliminary data, the air defense system was activated. Residents of the city claim that before this, they heard a siren. There is no official information about casual…