The Special Operations Forces of Ukraine reported that on the night of 20-21 May, its Deep Strike units, together with the Unmanned Systems Forces, struck the Rosneft oil refinery in Syzran, Russia's Samara Oblast.

Ukraine's defence forces struck the Kstovo oil refinery in Russia's Nizhny Novgorod Oblast on 18 May and an oil pumping station in Russia's Yaroslavl Oblast on 19 May.

Ukraine’s Defense Forces struck the Lukoil-Nizhegorodnefteorgsintez oil refinery on Russian territory on May 18 and the Yaroslavl-3 pumping station on May 19. — Ukrinform.