World crude oil prices hovered around 67 dollars Monday after touching two months highs amid worries of supply in Iran and Nigeria.

New York's main contract, light sweet crude for delivery in May, added 11 cents to close at 66.74 dollars a barrel, after touching 67.90 dollars, its highest since Feb. 1.

On London's ICE Futures exchange, the price of Brent North Sea crude for May delivery climbed 93 cents to 66.84 dollars a barrel, after hitting a seven-month high of 67.93 dollars.

On the New York Mercantile Exchange, the heating oil fell 0.11 cent to 1.8622 dollars a gallon as gasoline futures fell 2.11 cents to 1.8632 dollars per gallon, the highest since Oct. 4. Natural gas futures rose 3.4 cents to 7.244 dollars per 1,000 cubic feet.

Traders are still concerned about the possibilities that Iran's oil exports would halt if the United Nations imposes Teheran an international sanction for its nuclear activities.

Iran has test-fired a new torpedo successfully in the ongoing war game in the Gulf, Iranian television reported Monday. President Mahmoud Ahmadinejad said on Monday that the Iranian nation would "exercise its determination to produce nuclear energy it needs for economic development."

Iran is OPEC's number-two producer behind Saudi Arabia, making four million bpd of oil and exporting 2.4 million bpd.

Meanwhile, about one-fourth of Nigeria's daily output is still shut after a series of militant attacks. Nigeria is Africa's leading oil producer and the fifth-biggest source of U.S. oil imports.

Source: Xinhua