The Russian oil refinery in Krasnodar Krai stopped operating on May 19. It was attacked during the night, according to RIA Novosti. The oil refinery in Slavyansk-on-Kuban, Russia, has reportedly halted operations. Explosions were heard in the vicinity of the refinery overnight, and reports indicated a drone attack and subsequent fire. There were explosions heard overnight in the area near the oil refinery. Reports circulated online that drones attacked the plant, causing a fire. The Russian Ministry of Defense, meanwhile, claims that 57 drones were destroyed or intercepted over the Krasnodar K…