The IAEA chief on Saturday underscored the military restraint to avoid the risk of a nuclear accident after a new attack on Iran's nuclear facility.

VIENNA, March 21 (Xinhua) -- The International Atomic Energy Agency (IAEA) chief on Saturday underscored the military restraint needed to avoid the risk of a nuclear accident after a new attack on Iran's nuclear facility.

The IAEA said on social media that it was informed by Iran of the attack on its Natanz nuclear site earlier on Saturday. The agency is investigating the situation and has received no reports of an increase in off-site radiation levels.

IAEA Director General Rafael Grossi reiterated his call for military restraint to avoid further disastrous damage.

According to the Atomic Energy Organization of Iran, the United States and Israel carried out an attack on the Natanz uranium-enrichment facility on Saturday morning. No radioactive leaks have been reported, and residents near the site were not at risk.

Iran's nuclear facilities have been struck several times since the Israeli-U.S. joint force started its attack on the Mideast country on Feb. 28. Last week, on Tuesday evening, an attack hit the premises of Iran's Bushehr nuclear power plant on the southern coast along the Persian Gulf. The Iranian authority said it was the third strike in proximity to Iranian nuclear facilities after Natanz and Isfahan and urged the IAEA to condemn such attacks, warning of "very grave and serious situation."  ■