The Israel Defense Forces confirmed it carried out a new airstrike on Iran's Arak heavy water reactor, describing the site as key infrastructure for producing plutonium for nuclear weapons. The facility, officially known as the Khondab Heavy Water Research Reactor, had previously been bombed during the June 2025 war after being left partially built. According to the military, the latest strike followed renewed Iranian efforts to restore the site.

The military said it issued an advance warning before the attack and urged residents in surrounding areas to evacuate. It stated that repeated reconstruction attempts by the Iranian regime were identified after the earlier strike, prompting the decision to target the facility again.

Originally designed in a way that would allow for easy production of plutonium, the reactor was modified under the 2015 nuclear agreement to reduce weaponization risks, including the removal and filling of its core with concrete. The Israel Defense Forces said Iran had avoided fully converting the reactor to prevent weapons-grade plutonium production and described the facility as both a strategic nuclear asset and a significant source of revenue for Iran's atomic energy authorities.