Iran told the agency that no nuclear material had been introduced into the plant, and enrichment levels would only be high enough to make nuclear fuel, not a bomb.

BBC: Iran 'concealed nuclear facility'

Amano noted that Iran has recently begun installing IR-2m centrifuges at its fuel enrichment plant at Natanz, and that those high-speed devices that rotate to enrich uranium are more advanced than the previously-installed centrifuges.

CNN: Nuclear watchdog agency says Iran not cooperating