President Nicolás Maduro said Friday that Venezuelan authorities captured a U.S. spy targeting a pair of refineries on the north Caribbean coast as this nation once wealthy from oil is gripped by a deep gasoline shortage. The spy, Maduro alleged, was a Marine who had served as a CIA operative in Iraq. The suspect was captured Thursday while possessing specialized weapons and a large sum of dollars, Maduro said, adding that the man was being interrogated about his activities around the Amuay and Cardon refineries in Falcon state.