Crude oil for September delivery moved to more than $106 per barrel in New York Tuesday morning as strikes resumed in Libya.
Voice of America reported Libya's production has been cut in half by the walkouts.
In the latest development, resuming strikes curtailed operations at two major oil-handling ports, Es Sider and Ras Lanuf, after a brief hiatus, Voice of America said.
The ports have a daily capacity of handling 600,000 barrels per day.
On the New York Mercantile Exchange, West Texas Intermediate crude added 33 cents to $106.44 per barrel. Reformulated blendstock gasoline gained 2.34 cents to reach $2.9275 per gallon. Home heating oil added 2.51 cents to reach $3.046 per gallon.
Natural gas shed 0.1 cents to $3.309 per million British thermal units.
At the pump, the national average price for a gallon of unleaded regular gasoline was $3.542, down from Monday's $3.549, the AAA Fuel Gauge report said.