Iran has officially unveiled what it says is a locally developed missile defense system with a range of 400 kilometers, capable of detecting cruise missiles, ballistic missiles and drones.
Iranian authorities announced the system on Saturday at a time of growing tension between Tehran and the United States.
Iran shot down a US drone in the Gulf with a surface-to-air missile last June, saying the drone was flying over its territory, but Washington said it was in international airspace.
Iranian television showed footage of Falaq, a mobile radar vehicle that the television said was an advanced version of the gamma system, which military experts said was Russian in origin.
Concerns over Iran's ballistic missile program contributed to Washington's withdrawal last year from a 2015 deal with world powers aimed at curbing its nuclear ambitions in return for easing economic sanctions.
"The system has high capabilities and is capable of detecting all types of cruise missiles, ballistic missiles and drones," the semi-official Mehr news agency quoted the commander of Iran's air defense force, Brigadier-General Ali Reza Sabahi Fard, as saying.
According to Sabahi Fard, the Falaq system is a locally upgraded version of a system that has been out of service for a long time and did not mention the country of origin.