UN inspectors gain access to one of two sites where undeclared nuclear activity may have taken place in the early 2000s; second site to be inspected later this month

Top official says 'traces of an explosion' found inside building at Natanz nuclear complex, but refuses to divulge cause, citing ongoing investigation

US experts cite satellite images and state TV reports; previously unknown Cheetahs of the Homeland says it is behind blaze

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'

Spokesperson confirms damage at 'industrial shed' near Natanz, which comes days after explosion rocked missile production facility near Tehran

Officials said to tell Gantz Tehran hasn't increased uranium enrichment during pandemic, but is still just 2 years away from bomb

Confidential report says Tehran continues to increase its stockpiles of enriched uranium and enriching beyond levels allowed under nuclear deal

Confidential IAEA report reveals Tehran has tripled its stockpile of enriched uranium in violation of nuclear deal; agency head demands 'clarifications' on site flagged by Israel

Move is not in protest of nuke deal violations, but rather due to uranium's technological incompatibility with production of isotopes for medical purposes

Kingdom berates Tehran after IAEA says uranium traces found at undeclared site, confirms enrichment at Fordo