Iranian president says third step away from 2015 nuclear deal will be of 'an extraordinarily significant nature' unless Europe comes up with solution

President Rouhani doesn't detail what move will entail, but says it is of 'extraordinarily significant nature'

But deputy foreign minister doubts such a plan can be hammered out before Tehran further reduces its commitments to 2015 pact

At Vienna summit, deputy FM tells remaining signatories of ailing 2015 pact they 'must not create any obstacles' to Tehran's oil exports

Diplomats examining the accord after Iranians flout the uranium stockpile and enrichment limits set out in the 2015 agreement

Paris urges Tehran to 'make the needed gestures' to save pact amid soaring tensions, and with remaining signatories set to meet Sunday

Iran continues to threaten UK over 'mean and wrong' seizure of ship said to be carrying crude to Syria in violation of EU sanctions, says London to blame for insecurity in region

Apparent violation of the pact comes a week after Tehran announced it had exceeded its caps on stockpiling low-enriched material

Iranian official says talks in Vienna with remaining signatories to 2015 accord 'could not satisfy Iran’s just demands'

Iranian deputy foreign minister says will report back to Tehran for decision, but country will continue to reduce commitments to uranium caps unless 'expectations are met'