Iran closed major border crossings with northern Iraq on Monday to protest the U.S. detention of an Iranian official, a Kurdish official said. At least four border gates had been closed, with just one remaining open in a move that will severely curtail trade between the two countries, the governor of the Kurdish province of Sulaimaniyah, Dana Ahmed Majeed, told The Associated Press. The move came four days after U.S. troops arrested an Iranian official during a raid on a hotel in Sulaimaniyah, 260 kilometers (160 miles) northeast of Baghdad.