Addressing the United Nations General Assembly on Thursday, Israeli Prime Minister Benjamin Netanyahu declared that Iran has “another secret facility in Tehran — a secret atomic warehouse for storing massive amounts of equipment and materiel from Iran’s secret nuclear weapons program.”

Netanyahu says this facility is distinct from the facility that Israeli intelligence officers raided earlier this year. Netanyahu said his government had provided its findings to the International Atomic Energy Agency and partner nations. He also pointed out that the facility is now in the process of being emptied by Iranian interests. But most compelling of all, Netanyahu alleged that the Iranians removed 15 kilograms of undeclared radioactive material from the site and spread it throughout Tehran to avoid concentrations that would allow for external intelligence service identification.