IAEA chief expects 'very significant damage' at Iran's Fordow site
At this time, no one, including the IAEA, is in a position to have fully assessed the underground damage at Fordow," Grossi said in a statement to an emergency meeting of the International Atomic Energy Agency's 35-nation Board of Governors.
The IAEA has not been able to carry out inspections in Iran since Israel started its military strikes on nuclear facilities there on June 13.
"Given the explosive payload utilised and the extreme(ly) vibration-sensitive nature of centrifuges, very significant damage is expected to have occurred," Grossi added.