TEHRAN: Iran has deployed S-300 surface-to-air missile defence system around its Fordow uranium enrichment facility.
Iranian state TV aired footage of deployment of the Russian-supplied missile system to the underground nuclear site in central Iran.
Iran and the six major powers reached a landmark nuclear deal last year aimed at curbing Tehran's nuclear programme in exchange for lifting nuclear-related sanctions.
Enrichment of uranium at the Fordow facility has stopped since the implementation of the nuclear deal in January.