Iran lashes out at Austria after a report claims Tehran has an advanced nuclear weapons program, sparking diplomatic tensions and calls for explanations.

Iran has increased its stockpile of highly enriched uranium by 50 per cent, according to the UN’s nuclear watchdog, raising the stakes even as the country holds talks with the US to resolve its ...

Iran has further increased its stockpile of uranium enriched to near weapons-grade levels, a confidential report by the U.N. nuclear watchdog said Saturday. In a separate report, the agency called on ...