A worker at an oil field owned by Bashneft, Bashkortostan, Russia, in this January 28, 2015 file photo. International Energy Agency (IEA) chief Fatih Birol said on Sunday that oil prices may have bottomed but that would depend on global economic growth. Asked if oil prices had reached a bottom, Birol told Reuters: “It may well be the case, but it depends on economic growth.” He expected global oil demand to grow by 1.2 million barrels per day this year while non-OPEC oil production would fall by more than 700,000 bpd. (Reporting by Osamu Tsukimori; Editing by Jacqueline Wong)