Ukrainian drones attacked one of Russia’s largest oil refineries and an explosives manufacturing plant
28 March 12:14
Drones belonging to the Ukrainian Armed Forces attacked one of Russia’s largest oil refineries in Yaroslavl and the Promsintez explosives factory in the Samara Region.
This was reported by "Komersant Ukrainian", citing Russian propaganda media.
According to monitoring channels Exilenova and Supernova, there were several strikes on the oil refinery in Yaroslavl on the night of March 28, after which fires broke out on the plant’s grounds. According to eyewitnesses on social media, the drones approached the target from the northwest, flying over the city before striking the industrial zone. Yaroslavl Region Governor Mikhail Yevraev stated that over 30 UAVs were “repelled” in the region.
At the same time, the Promsintez plant in Chapaevsk, Samara Oblast—one of Russia’s largest manufacturers of explosives—was also targeted. According to the OSINT channel “CyberBoroshno,” the attack was carried out by a long-range Ukrainian FP-5 “Flamingo” missile: a photo of the missile was published, and a video of the strike on the production area where explosives are synthesized was geotagged.
ASTRA analyzed videos from social media, which indicates that the strike hit the Chapaevsk industrial hub, home to two defense enterprises—JSC “Promsintez” (manufacturing TNT, ammonium nitrate, and nitrobenzene) and JSC “Polymer” (weapons, ammunition, and explosives). Eyewitnesses reported a large number of explosions; police blocked access to the industrial complex after the attack, ASTRA reports. Vyacheslav Fedoryshev, Governor of the Samara Region, stated that there were no casualties and no damage to social or residential facilities.
The Yaroslavl Oil Refinery (Slavnafta-YANOS LLC) is among the top five largest refineries in Russia by capacity, capable of processing over 15 million tons of crude oil per year. The facility supplies fuel to both the civilian market and the Russian military—the General Staff of the Armed Forces of Ukraine previously stated that it is involved in supplying troops. The facility has already been attacked by drones on multiple occasions—in January 2024 and December 2025.
This is not the first time Promsintez has come under attack: in March and April 2025, the plant was forced to suspend operations following UAV attacks. On the night of March 22, 2026, a drone struck the roof of one of the workshops, causing a fire.
According to the Russian Ministry of Defense, over the course of just one night, air defense forces “intercepted and destroyed” 155 Ukrainian drones over the territories of 15 Russian regions and the annexed Crimea.
