International Atomic Energy Agency finds that Iran has significantly expanded its stockpile of uranium enriched to levels close to weapons-grade, defying international demands.
Responding to latest IAEA report, US calls on Iran to dilute all of the uranium it has enriched to up to 60% purity.
UN's nuclear watchdog says Iran is still stonewalling the agency on key issues in latest report.
Sources tell Wall Street Journal Iran has diluted some of its stockpile of enriched uranium.
Israeli official says Israel is telling US and Europe that any Iranian progress above 60% enrichment could trigger military action.
IAEA chief says he held "constructive" talks with Iranian officials after discovery of uranium enriched to near weapons-grade level.
IAEA chief Rafael Grossi says Iran can make a nuclear bomb but there is no indication it currently has a nuclear weapons program.
In its latest report, UN atomic watchdog says Iran has increased its enriched uranium by 6.7 kilograms since September.
Spokesman of Atomic Energy Organization of Iran says Tehran informed IAEA in advance of its decision to enrich uranium at 20%.
Latest IAEA report finds Iran's stockpile of enriched uranium is more than 18 times the limit laid down in 2015 deal with world powers.
Iran says it supplied UN nuclear watchdog with documents explaining the discovery of suspect enriched uranium traces.
Biden administration official says Iran's breakout time to nuclear weapon is "really short" and alarming.
Iranian official claims country has more than 210 kilograms of uranium enriched to 20 percent.
UN atomic watchdog confirms Iran has established a process to accelerate production of highly enriched uranium.
UN nuclear watchdog says Iran continues to violate 2015 nuclear deal and making progress in its work on enriched uranium metal.
Iran says it has made 6.5 kg (14 lb) of uranium enriched to up to 60% and 108 kg of uranium enriched to 20% purity.
Iran’s Natanz nuclear site suffered an electrical disturbance just hours after starting up new advanced centrifuges used to enrich uranium.
IAEA's report shows uranium at 4.5% purity, more than the agreement ceiling.The mullahs are showing us that they can go higher. Op-ed.
Iran to bring back a second batch of enriched uranium it sent to Russia in 2015 as part of its commitments under nuclear deal.
State Department official says Washington doesn't know the precise location of the uranium Iran shipped out to Russia.
Secretary of State welcomes Iran's shipment of uranium to Russia as implementation of nuclear deal looms.
State Department spokeswoman says Washington expects Iran to reduce its stockpile of low enriched uranium by June 30 deadline.
California Democrat Schiff, Texas Republican McCaul, say US should press Iran to give up enrichment.
"At the end of the day, Iran is going to be a nuclear threshold state,” says Michael Hayden. "There's no question about that."
Iran can now go directly from 3.5% enrichment to 90% "within weeks at most," says Prime Minister.
Iran could produce enough uranium to build a nuclear bomb in a month, according to the Institute for Science and International Security.
