LONDON- Algeria's state firm Sonatrach sharply raised its June official selling price (OSP) for its Saharan Blend crude oil to dated Brent plus 40 cents a barrel, the company said on Tuesday.

This compares with a May OSP of dated Brent minus $2.50 per barrel.

(Reporting by Julia Payne and Ahmad Ghaddar; editing by Jason Neely) ((julia.payne@thomsonreuters.com; +44 207 542 1836;))