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

Britain, France and Germany say 'nobody should seek to exploit JCPOA negotiations' after negotiations halted

Iranian top diplomat accuses US of making new demands for nuclear talks and complicating negotiations in Vienna

Moscow demanding guarantees Western sanctions won't affect trade with Iran; US says it won't play 'Let's Make a Deal' with Moscow, as Iran accuses Washington of holding up talks

Iran's president claims 'big step' has been taken to revive 2015 nuclear pact, with solutions to issue of sanctions; other parties to talks indicate there is still a way to go

Moscow refuses to comment on the leaked remarks from Iran's top diplomat, as world powers try to salvage 2015 deal

Diplomat summarizes 2 weeks of deliberations 'with satisfaction' as negotiations enter drafting stage; Israeli officials said concerned US will rush to rejoin

Foreign Ministry appears to rule out mutual trust-building measures, reiterates all US sanctions must be removed before it takes any steps toward compliance with deal

Washington says it is open to direct negotiations, but scenario unlikely; Tehran continues to insist US must remove sanctions before it stops breaching the accord

Iranian move limiting inspections of its development program could draw rebuking resolution from IAEA quarterly meeting; Tehran's foreign minister warns against it