Reuters UK | Oil tumbles on Iran, Libya; worry about high supply returns Reuters UK U.S. crude futures also fell but only slightly, supported by data suggesting a smaller-than-expected build last week in the Cushing, Oklahoma delivery point for oil. Players were also betting the spread between the two oils would narrow after Brent's ... Oil falls to $61 on dollar, Iran, supply concerns Risk of US$32 oil price as U.S. heating demand fades Brent Oil Drops From 2015 High; Premium Over WTI Narrows |