UPDATE 7-Iran says it will confront any U.S. threat, Trump eyes new sanctions

Iran said on Saturday it would respond firmly to any U.S. threat, the semi-official Tasnim news agency reported, amid escalating tension between Tehran and Washington over the shooting down of an unmanned U.S. drone by the Islamic Republic.On Thursday, an Iranian missile destroyed a U.S. Global Hawk surveillance drone.Tehran repeated on Saturday that the drone was shot down over its territory.