The UN atomic watchdog reported no indication of increased radiation levels at Iran's main uranium-enrichment site, Natanz, indicating Israel's strikes hadn't breached the containment layers protecting Iran's nuclear stockpile.
Iranian authorities confirmed no higher radiation doses at Natanz, with no radiological contamination spreading beyond the site.
Israel did not target Iran's Bushehr nuclear power plant, Fordow enrichment site, or uranium-conversion facility, according to IAEA Director General Rafael Mariano Grossi.
Israel's Prime Minister Benjamin Netanyahu vowed to continue attacks until the perceived threat is eliminated.
Natanz and Fordow facilities are heavily protected, with the Natanz site built over 40 meters underground with a steel and concrete shell estimated to be 8 meters thick.
Grossi expressed deep concern over Israel's actions, stressing the importance of not attacking nuclear facilities for safety and security reasons.
Iran may have begun halting centrifuges due to electricity disruptions caused by the attacks.
IAEA inspectors remain in Iran, monitoring radiation releases and working with Iranian authorities to safeguard nuclear material.
In a statement, Iran had previously warned of 'special measures' to protect its nuclear material stockpile in case of an Israeli strike.
Last year, the IAEA conducted over 400 inspections in Iran, closely monitoring the country's uranium stockpile.