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

Bloc policy chief Borrell tells newspaper that overall US designation could be lifted, with the restrictions remaining on certain parts of the organization

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

'It definitely worries us': US blames Trump administration for Iran's nuclear development, urges diplomatic solution, as talks remain stalled

'There is no need to beat around the bush,' former parliament member Ali Motahari says; he argues Iran's failure was not keeping its plans a secret for long enough

Iran's president tells military parade Iranians are watching Israel closely, adds that the strength of the armed forces deters Tehran's enemies

Iranian atomic energy organization says Tehran 'obliged to intensify security measures' by shifting some machinery to Natanz, which was also a target of reported Israeli attacks

Installation of IAEA surveillance equipment, which will monitor production in facility at Natanz site, comes amid Western efforts to restore the nuclear deal with Tehran

President hails Tehran's atomic achievements on Nuclear Technology Day, as negotiations in Vienna to revive 2015 deal drag on

Move comes just weeks after Tehran said it set up another site for producing centrifuges in Isfahan, where UN watchdog doesn't have access to data collected by its cameras