World oil prices rose on Monday amid supply concern of Nigeria.

New York's main contract, light sweet crude for delivery in December, gained 88 cents to close at 60.02 dollars a barrel.

In London, Brent North Sea crude for December delivery rose 60 cents to settle at 59.75 dollars a barrel.

Output of 55,000 barrels per day of oil was cut in Nigeria when armed protesters forced the closure of a flowstation belonging to the Italian oil company Agip in the oil-rich Niger Delta, AFP reported.

The U.S. consulate general in Lagos on Friday issued a warning notice that more attacks on foreigners and oil facilities will occur in Niger Delta.

Since the beginning of last month, more than 30 oil workers have been kidnapped and 14 government solders killed in the oil production region during firefights between the militants and government troops.

Nigeria is the largest African oil producer or the sixth largest oil exporter in the world with a daily crude output of 2.6 million barrels.