An Israeli military strike on Iran's nuclear complex at Natanz directly hit the underground uranium enrichment plant there, the U.N. nuclear watchdog said on Tuesday, revising its assessment after initially reporting it had been hit only indirectly.

The head of the International Atomic Energy Agency says there is a possibility of both radiological and chemical contamination within Iran’s main nuclear enrichment facility in Natanz.

The United Nations atomic agency said it believes Israel directly hit the underground centrifuge halls at Iran's largest enrichment facility, Natanz. The International Atomic Energy Agency initially said Israel knocked out the power at the site,