Armed assailants blew up a pipeline pumping crude oil to the port of Es Sider on Tuesday, cutting Libya's output by up to 100,000 barrels per day (bpd), according to military and energy sources
Brent crude futures, the international benchmark for oil prices, were down 34 cents, or 0.5 percent, at $63.06 a barrel
Brent crude futures, the international benchmark for oil prices, were at $63.30 per barrel, up 73 cents, or 1.2 percent.