Norwegian oil workers expanded their ongoing strike on Monday, leading to the potential shutting off of oil and gas production at six offshore fields.

WTI crude (CLH5: $51.2 +3.2%) and Brent crude (LCOH5: $56.7 +3.6%) are trading higher for a third day as they continue to find support from the strike action at refineries in the US and a slump in Libyan exports. The potential for reduced supplies of motor fuel have led to strong rallies in gasoline and gas oil, which have in turn supported crude oil.