BRUSSELS—United Nations inspectors have found new evidence of undeclared nuclear activities in Iran, according to three diplomats briefed on the discovery, raising new questions about the scope of the country’s atomic ambitions.
Samples taken from two sites during inspections in the fall by the U.N.’s International Atomic Energy Agency contained traces of radioactive material, the diplomats said, that could indicate Iran has undertaken work on nuclear weapons, based on where it was found. The diplomats said they didn’t know the exact nature of what was found.
Last year, Iran blocked IAEA inspectors from checking the sites involved for seven months, leading to a standoff. Tehran has long denied that it has sought to make an atomic bomb and said all of its nuclear work is for peaceful purposes such as power generation and health care. There was no immediate comment from Iran on the findings.
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