Crude oil prices have increased on concerns over potential renewed U.S. sanctions against Iran as well as conflict in Iraq. An explosion at a U.S. oil rig and reduced exploration activity also supported prices there. Brent crude futures, the international benchmark for oil prices, were at...

Oil prices dipped over concerns that OPEC producers would not be able to maintain their high compliance so far with output cuts aimed at reining in a global fuel supply overhang. Brent crude was trading at $55.83 per barrel at 0800 GMT (3 a.m. ET),...