The underground Natanz Fuel Enrichment Plant (FEP) is one of several Iranian facilities monitored by inspectors of the International Atomic Energy Agency, the UN nuclear watchdog.
Three Iranian officials who spoke to Reuters on condition of anonymity said they believed the fire was the result of a cyber attack, but did not cite any evidence.
One of the officials said the attack had targeted the centrifuge assembly building, referring to the delicate cylindrical machines that enrich uranium, and said Iran’s enemies had carried out similar acts in the past.
Asked on Thursday evening about recent incidents reported at strategic Iranian sites, Israeli Prime Minister Benjamin Netanyahu told reporters: “Clearly we can’t get into that.”
In 2010, the Stuxnet computer virus, which is widely believed to have been developed by the United States and Israel, was discovered after it was used to attack the Natanz facility. to have been developed by the United States and Israel, was discovered after it was used to attack the Natanz facility.