Iran displayed what it described as a domestically-built long-range, mobile surface-to-air missile system on Thursday, Iranian state media reported.
The announcement came at a time of rising tension between Iran and the United States in the Persian Gulf.
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State television showed Iranian President Hassan Rouhani attending an unveiling ceremony for the Bavar-373 system, which Iranian media have described as a competitor to the Russian S-300 missile system.
The Bavar-373 is able to recognize up to 100 targets simultaneously and confront them with six different weapons. It has a maximum range of 200 kilometers (120 miles) and a flight ceiling of up to 27 kilometers (17 miles), state media boasted.
The system's unveiling came on Iran's National Defence Industry Day. Iran has developed a large domestic arms industry in the face of international sanctions and embargoes that have barred it from importing many weapons.
Western military analysts say that Iran often exaggerates its weapons capabilities, though concerns about its long-range ballistic missile program contributed to Washington's decision last year to leave the pact that Iran sealed with world powers in 2015 to rein in its nuclear ambitions in exchange for an easing of economic sanctions.