Oil firms on tight supply though EU ban on Russian oil still uncertain
A flame burns from a tower at Vankorskoye oil field owned by Rosneft company north of the Russian Siberian city of Krasnoyarsk March 25, 2015. REUTERS/Sergei Karpukhin/File Photo Register now for FREE unlimited access to Reuters.com register May 26 (Reuters) – Oil prices rose on Thursday, extending a cautious rally this week on signs of … Read more