IAEA reports to its members that three cascades of advanced IR-6 centrifuges have been brought online at underground facility, according to Reuters

UN nuclear chief Rafael Grossi urges more transparency from Tehran, says 'good words' not enough

Tehran's nuclear agency head Mohammad Eslami says UN watchdog 'exploited by illegitimate regime,' has had 'reputation destroyed'

IAEA head says loss of equipment at nuclear sites poses a 'serious challenge' to monitoring efforts, calls situation 'very tense'

US, Britain, France and Germany urge Tehran to 'fulfill its legal obligations' to UN watchdog and demonstrate that its nuclear program is not being used for military purposes

Bennett applauds motion brought by US, Britain, France and Germany as exposing Iran's 'true face'; Russia and China oppose resolution

WSJ reports that Iranian intelligence secured internal documents from UN nuclear watchdog allowing Tehran to evade inspections; details uncovered in archive Israel seized from Iran

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

Head of country's Atomic Energy Organization blames Israel for 'sowing doubts' about the nature of the Islamic Republic's nuclear program

IAEA's Grossi says visit to 'address outstanding questions,' without further details; may include weapons program probe; Iran official: 'God willing there will be an understanding'