IAEA chief Grossi says watchdog remains ready to engage with Tehran on disputed issues to determine if its nuclear research really is for peaceful purposes

Resolution drafted by US and European nations a sign of their growing impatience as diplomats warn window to save deal is closing

Iranian foreign minister also cautions West against trying to censure Tehran over unexplained uranium traces at undeclared sites at next IAEA meeting

Hosting Rafael Grossi for talks, PM urges use of 'all means' to prevent Tehran from getting nukes, accuses Islamic Republic of concealing atomic work with 'false info and lies'

Tehran has amassed more than 3,800 kilos of material, IAEA reports after detecting radioactivity at potential undeclared nuclear sites

IAEA head Rafael Grossi says Tehran has refused to clarify evidence of illicit uranium enrichment, as EU's Mora heads back to Iran in bid to get nuke talks back on track

International Atomic Energy Agency confirms machines moved to Natanz for better protection, after sabotage blamed on Israel at several plants

Rafael Grossi says UN agency also working to clarify Tehran's response to findings of traces of enriched uranium at three sites across Iran

Atomic energy agency says strike could have caused 'catastrophe'; UN atomic watchdog says Chernobyl radiation levels normal again after 'very, very dangerous' takeover by Moscow

'We must act now to help prevent the danger of a nuclear accident,' IAEA's Rafael Grossi says following Russian capture of several facilities