Oil prices edged lower on Monday as a rising rig count in the United States pointed to higher production, but prices held near more than three-year highs and were on track to rise for a second consecutive month.
The oil complex has been driven by supply concerns amid prospects of the United States reimposing sanctions on Iran, while OPEC-led producers continue to withhold supplies.
Brent crude futures, the international benchmark, dipped 34 cents, or 0.5 percent, to $74.30 a barrel in early trading. Prices climbed as high as $75.47 last week, levels not seen since November, 2014.
U.S. West Texas Intermediate crude futures were at $67.98 a barrel, down 12 cents, or about 0.2 percent, from their last settlement.