Vienna, June 17 -- There has been no additional damage at Iran's Natanz Fuel Enrichment Plant site since Friday's attack, and the radioactivity outside the Natanz site has remained unchanged at normal levels, the UN nuclear watchdog announced.

"There has been 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 hall may have damaged the centrifuges there," said the International Atomic Energy Agency (IAEA) Director General Rafael Grossi to the IAEA Board of Governors.

Grossi added that within the Natanz facility, there is both radiological and chemical contamination. The radiation, primarily con...