If follows the assassination of Iran’s top nuclear scientist outside Tehran last November. Akbar Salehi, who the Iranian Atomic Energy Organisation, confirmed the attack in a message shared on a telegram channel run by Iran’s elite revolutionary guard.
He said: “Today’s attack demonstrates that the enemies of Iran’s progress and advancement in nuclear science, as well as nuclear negotiations, are in desperation committing terrorist actions against the nuclear technology at Natanz.”
Whilst Iran insists its nuclear programme is peaceful a number of regional powers are convinced it is trying to build a nuclear bomb.
The Natanz facility, much of which is underground, is one of Iran’s most important nuclear sites.
Mr Selehi added: “Iran reserves the right to respond against eh perpetrators, and those who committed the terrorist action. “
Earlier Iran’s Atomic Energy Organisation reported there had been an “incident” at the plant.
Spokesman Behrouz Kamalvand added: “Fortunately, the incident did not cause any human injuries or leaks.
“The causes of the accident are under investigation and further information will be announced later.”
On Saturday Iranian president Hassan Rouhani announced 164 new uranium centrifuges had been launched at the site.
These separate uranium isotopes which can then be used to provide nuclear power, or put towards nuclear weapons.
Mr Rouhani said: “Today, a chain of 164 IR-6 centrifuges was launched.
“It can provide us with products 10 times more than the former chain.”
Iranian nuclear facilities and scientists have suffered a number of attacks in recent years.