Iran is dismissing US moves to increase the defensive missiles system in Gulf Arab countries against potential strikes by Tehran.
Foreign Ministry spokesman Ramin Mehmanparast said on Tuesday that Iran considers the US plan "inefficient."
The remarks follow reports that the Obama administration has quietly increased the capability of land-based Patriot defensive missiles in several Gulf Arab nations. One US military official said last week that the Navy is increasing the presence of ships capable of knocking out hostile missiles in flight.
Iran has missiles ranging up to 1250 miles which could hit Israel and the US bases in the region.