US calls blocking of UN official from nuclear site an 'outrageous provocation,' warns Tehran to not 'test the international community's resolve'

Tehran says woman triggered an alarm last week at the entrance to the Natanz uranium enrichment plant

As 2015 atomic deal crumbles, officials say Islamic Republic harassed IAEA official at Natanz site

IAEA says Tehran's uranium enrichment at Natanz facility violates 2015 accord, as Iranian leaders rebuke US, European nations for economic sanctions

Attack on Iranian centrifuges, uncovered in 2010, required operative to carry sabotaging software into Natanz site and deliver it to control systems