Singapore - US crude fell more than $1 on Monday towards $100 after Libyan leader Muammar Gaddafi regained control of some territory over the weekend in the country's civil war.
US crude for April fell $1.08 to $100.08 a barrel at 2252 GMT, after sliding $1.54 on Friday, when a massive earthquake shook Japan, shutting refineries and other industrial facilities in the world's third-largest oil consumer and triggering a broader sell-off in commodities.
Brent crude fell 69 cents to $113.15.
