Iranian President Mahmoud Ahmadinejad has said Iran will welcome the idea of setting up a U.S. diplomatic office in Tehran. U.S. media has quoted the Iranian leader as saying he would consider an American request to set up an interests section in Iran. He said he "welcomes any move to expand ties." But Ahmadinejad said his government hasn't received any official request for such an office. Last month, U.S. officials floated the idea but no formal requests were made.