Head of Iranian atomic agency claims no such trip planned 'for the moment,' as UN watchdog presses for answers on uranium traces at undeclared sites

IAEA report says Tehran now has 62.3 kilograms of uranium enriched to up to 60% fissile purity, which is a short step away from weapons-grade levels

Moscow has made unsubstantiated accusations that Ukraine is preparing to use an explosive laced with radioactive materials

IAEA update finds installation of advanced centrifuges now complete at Natanz underground plant; Tehran says plans to add even more of devices banned under 2015 deal

'Dialogue has restarted with Iran on clarification of outstanding safeguards issues,' Rafael Grossi says after declaring UN watchdog won't close probe opposed by Tehran

Speaking at nuclear watchdog's annual conference Grossi tells Iran that probe 'not going to go away'; Tehran accuses Israel of planting evidence

International Atomic Energy Agency urges Russians and Ukrainians to agree on an end to shelling around Zaporizhzhia site to prevent further damage

Ukrainian staff say last power line down, but IAEA finds reserve line to thermal power station still works, sending electricity to grid; Erdogan offers to facilitate talks on plant

British defense ministry reports continued shelling in district where Zaporizhzhia located; Kyiv: Moscow 'making every effort' to prevent UN inspectors from learning facts

IAEA chief Grossi says physical integrity of Zaporizhzhia site was breached and that he gathered a 'lot of information,' amid fears shelling could cause nuclear disaster