Israel attacked Iran's Isfahan nuclear site in the early hours of Saturday, the Fars news agency reported, saying there were no hazardous leaks or risk to the population.
Quoting a security official, it said Israel carried out multiple attacks, including on the Isfahan site, saying "most of the explosive sounds heard in these attacks were related to air defence activity".
There was no "leakage of hazardous materials," the official was quoted as saying.
A US-based NGO, the Human Rights Activists News Agency, said on Friday, based on its sources and media reports, that at least 657 people have been killed in Iran.
Iran has not updated its tolls since Sunday, when it said that Israeli strikes had killed at least 224 people, including military commanders, nuclear scientists and civilians.
Since Israel launched its offensive on June 13, targeting nuclear and military sites but also hitting residential areas, Iran has responded with barrages which Israeli authorities say have killed at least 25 people.
