Iran will retaliate against any country that carries out cyberattacks on its nuclear sites, the head of civilian defence said, after a fire at its Natanz plant which some Iranian officials said may have been caused by cyber sabotage.
The Natanz uranium-enrichment site, much of which is underground, is one of several Iranian facilities monitored by inspectors of the International Atomic Energy Agency (IAEA), the U.N. nuclear watchdog.
Iran's top security body said on Friday that the cause of the "incident" at the nuclear site had been determined, but "due to security considerations," it would be announced at a convenient time.
Iran's Atomic Energy Organisation initially reported an "incident" had occurred early on Thursday at Natanz, located in the desert in the central province of Isfahan.
It later published a photo of a one-story brick building with its roof and walls partly burned. A door hanging off its hinges suggested that there had been an explosion inside the building.