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

Britain, France, and Germany say move is 'a serious development' amid ongoing negotiations to revive 2015 nuclear deal

Iranian envoy to UN atomic agency says Islamic Republic will start enriching at previously unseen levels by next week

Foreign minister says that after approaching elections, which will see Rouhani leave office, Tehran will have a regime that will 'not be able to do anything serious'

In phone call, British PM presses case of Nazanin Zaghari-Ratcliffe; also calls on Tehran to reverse breaches of nuclear deal

Iranian president meets Irish FM, calls for 'mutual respect' in negotiations over nuclear program

Amir Hatami says 'Zionist regime out of desperation' threatens Islamic Republic but knows the consequences; Rouhani urges Europe not to exert pressure over 2015 nuclear deal

Diplomat to meet Iranian officials as part of UN Security Council role; foreign minister Zarif says Tehran will soon present a 'constructive' plan of action

Ignoring warnings from Tehran, Paris says Europeans will lodge IAEA resolution condemning Islamic Republic for limiting nuclear inspectors

Several conservative candidates are vying for presidency, including former defense minister and head of judiciary; run by moderate FM Zarif also said to be a possibility