'Dispute mechanism' over Tehran's walking back of some commitments to 2015 pact allows 2 weeks for resolution of problems, although period can be extended if all sides agree

Top French diplomat warns Tehran could get access to atomic weapons within 'one or two years' if accord continues to lose substance

As Tehran resumes nuclear development, nations have threatened to bring case before UN Security Council and potentially initiate 'snapback' of sanctions

UK reportedly says not enough notice given for PM's visit on NATO sidelines; Merkel, Macron said not eager to meet him amid criticism on Iran moves

Terse statement from White House says leaders also talk about 'other critical bilateral and regional issues,' but gives no details

As 6 nations join INSTEX barter system, PM calls move a betrayal of Middle Easterners 'standing up to Iran and its henchmen'; says Europeans 'should be ashamed of themselves'

After Tehran says it briefly held official over alleged alarm she set off, statement urges Islamic Republic to 'ensure that no such incidents occur in the future'

EU says it will wait for UN confirmation on Tehran's announcement of increased production, cautions that Europe's commitment to 2015 pact depends on Iranian compliance

Ayatollah Ali Khamenei castigates European powers for failing to 'fulfill any of their commitments' under nuclear deal, achieving little more than 'long speeches'

European powers say no other plausible explanation for strike on key facilities, while Iran's FM claims if Tehran were to blame 'nothing would have been left'