There has been significant damage to the iranian nuclear facilities Natanz, which earlier in the week was on fire.
It was stated by a spokesman for Iran's atomic energy agency, according to the iranian news agency Irna.
on Thursday, there was a fire at Natanz, one of Iran's main plant for uranium enrichment.
the Damage could delay Iran's development and production of advanced centrifuges in the medium term, says the spokesperson, Behrouz Kamalvandi.
He also adds, that Iran would build a larger building with more advanced equipment as a substitute for the destroyed building at the Natanz plant.
the Plant is one of many iranian facilities, which are being monitored by the UN.
Iranian sources initially hinted that there may be a case of sabotage. Not least seen in the light of the great importance for Iran.
the Country has in recent days been hit by several accidents that have hit sensitive infrastructure.
Recently there was a fire in a power plant in southwest Iran on Saturday. The same day, 70 people admitted to having inhaled klorgas at a petrochemical plant, also in the southwest of Iran.
Tuesday, 19 people were killed in an explosion at a medical clinic in the northern part of the capital, Tehran.
Before then, there had been an explosion at a military site, where the development of weapons. The authorities have said that it was due to a gas leak in a warehouse outside the base.
Two of the three sources, which Reuters has spoken to, suggests that Israel may be behind a possible sabotage.
Israel is strongly critical of Iran and, not least, the country's nuclear facilities. The israelis fear that Iran may be developing nuclear weapons.
Sunday was Israel's defense minister Benny Gantz, was asked to the many recent fires and explosions in Iran. He replied that Israel 'does not necessarily' stand behind each and every mysterious incident in Iran.