Spokesperson for bloc says move 'inconsistent' with 2015 nuclear deal, warns it could 'significantly' boost Tehran's enrichment capacity

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

PM cites Tehran's rising regional aggression in phone call with French leader, amid Paris's efforts to facilitate a meeting between Trump and Rouhani

Tehran pessimistic about deal's prospects, while Europeans plan to raise subject of Iran's 'proven violations of their commitments' amid rising Gulf tensions

PM compares EU response to Iran to pre-WWII appeasement attempts with the Nazis, as bloc says recent violations of nuclear deal not sufficient to reimpose sanctions on Tehran

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

Tehran claims increase for "peaceful' purposes, accuses US and Europe of breaking nuke deal commitment, but move likely to further ratchet up tensions

IAEA to convene at request of Washington to discuss Tehran's breach of amount of enriched uranium it can stockpile under 2015 accord

Macron demands Tehran reverse its decision to violate nuclear deal, China 'regrets' Iranian move, but blames Trump

US economic clout is just too strong and European backers have no leverage to convince the Trump administration to change its policies, experts say