A prolonged conflict in the Middle East could cause a spike at American gas pumps, as the busy driving season approaches.

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Oil and gas prices surged while the dollar and safe-haven gold rallied on Monday as the U.S.-Israeli air war ​against Iran widened and looked set to last for weeks, prompting worries that it could upend a global economic recovery and perhaps reignite inflation.

Oil prices rose sharply when market trading began late Sunday over concerns that the supply from Iran and elsewhere in the Middle East would slow or grind to a halt.