Independent economic research think tank in Kiel, Germany
News update: Ukrainian forces have targeted one of Russia's largest oil refining complexes, the Gazprom Neftekhim Salavat plant in Bashkortostan, amid ongoing fighting. The attack follows nearby strikes on Russia's Black Sea naval base and a drone attack in Crimea. Repairs to another refinery in Orsk may take up to six months, according to regional authorities.