US president reiterates he is open to meeting with Iranian president; Tehran says it won't hold direct talks with the US without sanctions relief

Adrian Darya 1 two nautical miles away from Tartus naval base after being hounded by Washington in weeks-long voyage across Mediterranean

US secretary of state urges UK, France, Germany to take action after Tehran again curbs its adherence to nuclear deal with pledge to step up research and development

Mark Esper says Trump's 'maximum pressure' campaign aimed at compelling Tehran to negotiate a new deal that would prevent it from having nuclear weapons 'forever'

Tehran to take third step away from 2015 nuclear deal, state-run media reports; President Rouhani calls move 'highly significant'

If such a summit takes place, prime minister says he thinks the US president will maintain a 'tough and sober' approach

After setting Friday deadline for an EU solution for skirting US sanctions, Tehran says failure will bring 'significant' new rollback of nuclear limits on centrifuges

European Commission spokesman says Tehran's steps 'undermine' 2015 nuclear deal as European powers seek ways to keep it alive

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

US president's statement comes after Iranians rule out any high-level bilateral talks without sanctions relief