US bombing probably caused “very significant” damage to the underground areas of Iran’s Fordow uranium enrichment plant dug into a mountain, though no one can yet tell the extent, UN nuclear watchdog chief Rafael Grossi said on Monday.

Axar.az informs, citing Guradian, “Given the explosive payload utilised and the extreme(ly) vibration-sensitive nature of centrifuges, very significant damage is expected to have occurred,” Grossi said in a statement to an emergency meeting of the International Atomic Energy Agency’s 35-nation Board of Governors.

He added: “I indicated that any transfer of nuclear material from a safeguarded facility to another location in Iran must be declared to the Agency as required under Iran’s Safeguard Agreement, and I expressed my readiness to work with Iran on this matter.”