Iraq's Oil Minister Adel Abdel Mahdi (R) talks to journalists before a meeting of OPEC oil ministers in Vienna, Austria, June 2, 2016. REUTERS/Leonhard Foeger

Iraq’s Oil Minister Adel Abdel Mahdi (R) talks to journalists before a meeting of OPEC oil ministers in Vienna, Austria, June 2, 2016. REUTERS/Leonhard Foeger

Iraq's Oil Minister Adel Abdel Mahdi (R) talks to journalists before a meeting of OPEC oil ministers in Vienna, Austria, June 2, 2016. REUTERS/Leonhard Foeger

June 2, 2016 11:54 AM (UTC+8)