The Atomic Energy Organization of Iran (AEOI) said that the Shahid Khondab Heavy Water Complex in Arak and the Ardakan yellowcake production plant in Yazd Province had been targeted in strikes. The Israeli military later claimed responsibility for the attack. The Yazd plant processes natural uranium into a concentrated form, which is a step in preparing it for enrichment. The Arak plant produced heavy water used as a moderator in nuclear reactors, but had been out of operation since Israel struck it in June 2025.