Iran unveiled on Saturday what authorities said was a locally upgraded missile defence system with a range of 400 km (250 miles) and able to defend against cruise and ballistic missiles and drones.
The announcement comes at a time of rising tension between Iran and United States. Iran shot down a U.S. military surveillance drone in the Gulf with a surface-to-air missile in June. Tehran says the drone was over its territory, but Washington says it was in international airspace.
State television showed the Falaq, a vehicle and a mobile radar installation it said was an improved version of the Gamma system, which military experts said was of Russian origin.