President Volodymyr Zelenskyy has confirmed that Ukrainian forces used long-range drones to carry out strikes on a Russian oil refinery located 700 km from the Ukrainian border on the night of 21-22 May.

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.

President Volodymyr Zelenskyy has said that he has approved plans for long-range strikes on Russia in June.