Syria's Secret Nuclear Program

The story so far

As of September 7, 2026

Inspectors for the International Atomic Energy Agency say Syria under Bashar al‑Assad was secretly building a nearly complete nuclear reactor at Al‑Kibar in Deir Ezzor, configured to make material that can fuel a nuclear bomb. Excavation at the ruined site has exposed cooling works that match a reactor layout. The facility itself was destroyed in an airstrike in 2007, which is why the agency is now digging through what is left rather than examining an intact plant.

What turns a long‑argued suspicion into a documented program are the numbers now on the table. The agency has confirmed about 73 tons of undeclared natural uranium metal tied to the project, including 8,808 finished fuel rods and another 18 tons of scrap and manufacturing waste. By the agency’s own sizing, the Al‑Kibar reactor would have needed roughly 50 tons for a full core, which means inspectors have found enough for a complete load plus a significant reserve. That quantity, and the presence of finished fuel, point to a full supply chain behind the reactor, not a lab‑scale experiment.

The story has shifted from denial to accounting and control. After Assad’s ouster, Syria notified the agency in mid‑July that it held undeclared nuclear material at a separate site and invited inspectors in. The stock is now being logged and placed under international safeguards, with Damascus saying it wants to keep the material in national custody for a civilian program while the agency verifies and secures it. Rafael Mariano Grossi cautioned that even a few tons could be misused, and teams are working on proper storage and oversight.

What is at stake now is preventing diversion or theft of a large cache of nuclear material in a country still recovering from war, and closing a file that has hung over the region for nearly two decades. The decisive facts — a reactor built to make bomb fuel, a fuel inventory large enough for a core and more, and a manufacturing trail to produce it — explain both why the program was hidden and why today’s priority is physical security and full transparency rather than argument over what existed. The open questions are practical ones: whether Syria’s cooperation continues at pace, and whether any of the material should be removed rather than guarded in place.