Key OPEC+ producers reach preliminary output deal

The OPEC logo pictured ahead of an informal meeting between members of the Organization of the Petroleum Exporting Countries (OPEC) in Algiers, Algeria, September 28, 2016. REUTERS/Ramzi Boudina

Key producers of OPEC+ countries have reached a preliminary deal on gradually raising oil output until December and extension of their pact until end of 2022, an OPEC+ source told Reuters on Sunday.

OPEC+ holds an online meeting later on Sunday. 

Reporting by Rania El Gamal; Writing by Vladimir Soldatkin; Editing by Andrew Cawthorne