ABU DHABI, May 3 (Xinhua) -- The Abu Dhabi National Oil Company(ADNOC), the energy giant of the United Arab Emirates (UAE),announced on Thursday the retrospective prices of its four main grades of crude oil for April.

    According to ADNOC, the price for the onshore Murban crude oil was set at 67.60 U.S. dollars per barrel, while prices of the three offshore crudes were set at 67.65 dollars for Lower Zakum,67.05 dollars for Umm Shaif and 63.35 dollars for Upper Zakum respectively.

    ADNOC, a fully government-owned company established in 1971, is one of the world's leading oil companies with huge reserves. It currently produces over two million barrels of oil a day.