OPEC and allies agree to deepen oil output cuts

VIENNA (Reuters) - OPEC and allies led by Russia on Thursday agreed one of the deepest output cuts this decade to support crude prices and prevent a glut but were still debating how long the curbs would last next year.The Organization of the Petroleum Exporting Countries (OPEC) is meeting to discuss supply policy in Vienna. OPEC will then meet on Friday with Russia and other producers, a grouping known as OPEC+.Russian Energy Minister Alexander Novak said a panel of key energy ministers..