'We are advancing,' EU official at Vienna talks says, but Tehran's demand to shut down UN watchdog's probe remains unresolved

Top official says negotiators have secured guarantees that US won't be able to scupper deal by withdrawing from it in the future, claims world powers looking to finalize text soon

US State Department has not yet acknowledged end of talks; European mediator Enrique Mora vows to 'keep working with even greater urgency' to further deal

Semiofficial news agency describes negotiations as finished with 'no effect' on ending deadlock; no comment from either Washington or EU moderators

EU foreign policy chief Josep Borrell says that a final deal is now achievable; visit by EU envoy Enrique Mora went 'better than expected'

Iranian intelligence ministry does not specify nationality of those held; European Union's Enrique Mora arrives to discuss reviving 2015 deal under negotiation in Vienna

IAEA head Rafael Grossi says Tehran has refused to clarify evidence of illicit uranium enrichment, as EU's Mora heads back to Iran in bid to get nuke talks back on track

The yet-unfinalized visit by coordinator Enrique Mora is a move in the 'right direction,' according to Iranian foreign ministry

Adviser to Supreme Leader Khamenei tells Doha Forum removal of IRGC from US terror list 'important to Iranian people,' no compromise will be made on issue

'Perception' of Iran's Guards Corps to remain, despite Tehran conditioning revived nuclear deal on terror delisting; EU envoy in Tehran to hammer out remaining differences