Explosions were reported in the Iranian cities of Delijan and Arak, according to Iranian media, with Saudi state television amplifying the coverage. The Arak region is home to one of Iran’s most closely watched nuclear facilities, a heavy-water reactor that has sat at the center of international nonproliferation debates for years.

What happened and why Arak keeps coming up

The UN’s nuclear watchdog previously confirmed the facility was no longer operational. Smoke and blast reports near Arak were also documented in March 2026, making the latest reports part of a pattern rather than an isolated incident. Additional explosions were recorded in Arak and Isfahan in late March 2026, and separate blasts in southern…