Director at US-based Washington Institute writes that explosion at Natanz facility targeted advanced centrifuges, which Tehran needs to produce enough fissile material for a bomb

Move could pave way for deal's final collapse; Brussels' top diplomat calls for 'intensive efforts' to solve disagreements 'in good faith by all'

Tehran says no casualties or radioactive pollution in Natanz incident, claims Israeli social media took credit for 'sabotage,' warns 'Zionist regime' against 'crossing red lines'

Iranian president issues warning to UN nuke watchdog, criticizes European countries for not doing more to shield his country from American sanctions

Day after IAEA censures Tehran for blocking access to two sites and EU diplomats say they'll back extending arms embargo, rial plummets to 190,000 for each dollar

Iranian foreign minister levels accusation against UK, France and Germany after they back a UN arms embargo extension against Tehran

Defense minister hails IAEA resolution criticizing Tehran for blocking inspector's access to suspect sites; vows Iran will never get atomic weapons

Fox News cites report by Baden-Württemberg spy agency saying Iran, other states are seeking to 'complete existing arsenals... and develop new weapon systems'

Iranian weapons, missile parts seized by US in recent months may have been moved 'in manner inconsistent' with resolution endorsing nuke deal, according to new report

Under 2015 nuclear deal, ban on selling weapons to Iran set to progressively ease from October; Washington has prepared draft resolution to continue restrictions