The International Atomic Energy Agency (IAEA) said Saturday that Iran reported an attack on its Natanz nuclear site, but no off-site radiation increase was detected.

“The IAEA has been informed by Iran that the Natanz nuclear site was attacked today. No increase in off-site radiation levels reported. IAEA is looking into the report. IAEA Director General Rafael Grossi reiterates call for military restraint to avoid any risk of a nuclear accident,” the IAEA said in a statement on X.

The Iranian authorities earlier said that the Natanz nuclear facility was hit in a U.S.-Israeli airstrike Saturday but there has been no radiation leakage.

The U.S. and Israel launched what they described as a pre-emptive strike against Iran on February 28, claiming that Tehran was developing a nuclear weapon and posed a threat—an allegation Iran has denied. In response, Iran launched counterattacks, firing missiles and drones at Israel, as well as at U.S. assets and other targets across the Middle East.