That's according to regional governor Venyamin Kondratyev, Ukrinform reports.
One of the fuel oil distillation units caught fire. According to preliminary reports, the refinery was hit by drones.
The fire broke out on an area of 100 square meters. The blaze was put out.
Vyacheslav Gladkov, the governor of Russia's Belgorod region, earlier reported the shelling of the city of Shebekino. Residential buildings were allegedly damaged there.