Afghanistan, March 18 -- The International Atomic Energy Agency said on Wednesday that a projectile struck the premises of Iran's Bushehr nuclear power plant on Tuesday evening, in the first reported direct hit on an operating Iranian nuclear facility since the start of the current war. Iran told the U.N. watchdog that there was no damage to the plant and no injuries among staff.

IAEA Director General Rafael Grossi renewed his call for maximum restraint, warning that any military action against nuclear sites could trigger a dangerous accident. His remarks reflected mounting concern over the risks of attacks on sensitive atomic infrastructure during an already widening conflict.

Bushehr, located in southwestern Iran, is the country's only ...