International Atomic Energy Agency chief Raphael Grossi told the United Nations on Friday that an Israeli attack on Iran's Natanz nuclear facility destroyed an area where highly enriched uranium was produced.
"Above ground, part of the pilot fuel enrichment plant where Iran was producing uranium enriched up to 60% uranium-235 has been destroyed," Grossi said.
"Electricity infrastructure at the facility, an electrical substation, main electric power supply building, emergency power supply and backup generators have also been destroyed."
"There is no indication of a physical attack on the underground cascade hall containing part of the pilot fuel enrichment plant and the main fuel enrichment plant. However, the loss of power to the cascade may have damaged the centrifuges there."