The United States and Israel have attacked the "Arak" nuclear complex, Iranian state media reported.
Two separate attacks were carried out on the heavy water facility in Khondab.
Heavy water, or deuterium oxide, is used in nuclear research as a solvent for hydrogen. Although the strikes caused structural damage, no deaths or injuries were reported.
The strikes come amid tense negotiations between Washington and Tehran, where Iran's nuclear enrichment remains a hot topic, along with the regulation of the Strait of Hormuz.
The bombings were carried out after an evacuation warning.
The Israel Defense Forces had issued an "urgent warning" to evacuate the nuclear complex and another industrial area in the Arak area earlier.
Israel had previously bombed the Arak complex during the June 2025 war.