Top Iranian atomic official and parliament speaker announce development, five days after Natanz attack -- blamed on Israel -- reportedly destroys thousands of centrifuges

Khamenei says Vienna offers 'not worth looking at' after hiking uranium enrichment in response to alleged Israel attack on Natanz plant, with tensions skyrocketing

European official says Tehran 'puts pressure on everyone' by accelerating uranium enrichment at Natanz; FM Zarif says 'no alternative' to lifting sanctions

US president has pledged to rejoin 2015 accord if Tehran returns to compliance, but duplicative restrictions imposed by Trump administration complicate the lifting of sanctions

UN agency confirms Natanz facility will begin increasing operations shortly, days after sabotage said to have damaged thousands of centrifuges

As negotiations thrown into disarray following Natanz facility sabotage, supreme leader Khamenei warns the US time could be running out

Confirmation comes at a time of renewed tensions with Iran and efforts to bring Washington and Tehran back into the 2015 agreement

Nuclear negotiator also says 1,000 more centrifuges will be installed at Natanz nuclear facility, the site of a recent attack blamed on Israel

Iranian FM says Tehran can now legitimately use any capacity it has at Natanz after 'terrorist stupidity'; Russia's Lavrov says Moscow expects nuke deal to be saved

NY Times cites officials who say device was smuggled into plant; Tehran lawmakers call for suspension of nuclear talks; US officials don't know if Iranians will show up in Vienna