EU's foreign policy chief and foreign ministers of Britain, France, and Germany say they will assess Tehran's adherence to 2015 pact, remain determined to keep agreement alive

EU countries, wary of being punished by Washington for breaking sanctions, have so far proved unable to deliver the promised economic advantages to Iranians

President tightens the screws with sanctions on Tehran's mining industry, after it moves to suspend part of obligations under nuclear deal

Leaders express concern at Tehran's threat to step up enrichment, while hoping Iranian president is chiefly seeking to show strength domestically

US measures on all trade of Iranian iron, steel, aluminum and copper come hours after Islamic Republic partially left nuclear deal, threatened to step up uranium enrichment

Announcement by Trump aide comes hours after Tehran announced it was setting up possible return to high-level uranium enrichment

Germany calls on Tehran to uphold its end of 2015 accord, while UK warns Islamic Republic of 'consequences' if it doesn't honor its commitments

Prime minister gives first Israeli response to announcement by Iran's Rouhani that Tehran will keep excess uranium, resume high-level enrichment if no new terms are set

Tehran informs five remaining partners to 2015 nuclear deal of its response to US pullout last year, Zarif says country remaining in pact

French diplomat says Europe may reimpose sanctions if Iran pulls out of deal as Tehran hints at retaliatory actions on anniversary of US leaving pact