Oil prices keep rising ahead of OPEC meeting

NEW YORK, May 23 (Xinhua) -- Oil prices settled higher for a fifth straight session Tuesday, as investors eyed the Organization of the Petroleum Exporting Countries' (OPEC) meeting scheduled on Thursday.

The West Texas Intermediate for July delivery increased 0.34 U.S. dollar to settle at 51.47 dollars a barrel on the New York Mercantile Exchange, while Brent crude for July delivery added 0.28 dollar to close at 54.15 dollars a barrel on the London ICE Futures Exchange.