Iran has deployed the Russian-supplied S-300 surface-to-air missile defense system at its Fordow underground uranium enrichment facility, Iranian state media reported on Monday.
Iranian state TV on Sunday aired footage of deployment of the recently-delivered missile system to the nuclear site in the central Iran.
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"Our main priority is to protect Iran's nuclear facilities under any circumstances," Brigadier General Farzad Esmaili, commander of the Islamic Revolutionary Guards Corps, or IRGC, air defense force told state TV.
The footage showed the S-300 carrier truck raise its missile launchers toward the sky as it was positioned next to other counter-strike weaponry.
Iran and the six major powers reached a landmark nuclear deal in 2015 aimed at suppressing Iran's nuclear programme in exchange for lifting sanctions against Tehran for its disputed nuclear work.
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Enrichment of uranium at the Fordow facility, around 60 miles south of Tehran, has stopped since the implementation of the nuclear deal in January.
Under pressure from the west, Russia canceled a contract to deliver S-300s to Iran in 2010. But Russian President Vladimir Putin lifted that self-imposed ban in April 2015, after an interim deal was reached between Iran and the six powers.
In August, Iran said that Russia had delivered main parts of the system to the country, adding that the missile system would be delivered in full by the end of 2016.
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The IRGC's Esmaili did not say whether the system was operational, but added: "Today, Iran's sky is one of the most secure in the Middle East".
Iran's top authority Supreme Leader Ayatollah Ali Khamenei said on Sunday that the country's military power was for defensive purposes only to guard against U.S. attacks.
“Continued opposition and hype on the S-300 or the Fordo site are examples of the viciousness of the enemy,” Khamenei said in a speech broadcast live on state TV. "The S-300 system is a defense system not an assault one, but the Americans did their utmost to prevent Iran from getting it."
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