Iran nuclear: Zarif says powers 'changing positions'

By BBC News

Iran has accused world powers of changing positions in marathon talks in Vienna aimed at resolving the crisis over Iran's nuclear programme.
Iran's foreign minister said the sides would probably spend the weekend in negotiations, after missing successive self-imposed deadlines for a deal.
Mohammad Javad Zarif said "several countries" had changed positions, making the task harder.
His US counterpart said they would not be rushed into concluding an accord.
"We're here because we believe we are making real progress," John Kerry told reporters on Thursday.

But he cautioned that "we are not going to sit at the negotiating table forever" and that he was prepared to "call an end" to nuclear talks with Iran if "tough decisions" are not made."
He said though that "the stakes are very very high, we will not rush and we will not be rushed."
The failure to reach a deal by Friday meant US Congress would now take twice as long - 60 days - to decide whether to accept or reject any eventual deal, keeping sanctions in place until then.
Mr Zarif said late on Thursday that members of the so-called P5+1 (US, UK, Russia, France, China and Germany) who are negotiating with Iran were making "excessive demands".

Iranian FM Mohammad Javad Zarif (left) and his US counterpart said they would not be rushed to get the job done

The sides have continued talking long past a self-imposed 30 June deadline to turn a framework deal into a comprehensive, final agreement.
The P5+1 and Iran are working on a deal which will curb Iran's nuclear programme in return for sanctions relief, though the pace of the lifting of sanctions has been a major sticking point.
The West suspects Iran of secretly seeking to build nuclear weapons. Tehran says its programme is solely for peaceful purposes.
Another deadline was missed - but no side in this marathon is calling it a bad sign. Negotiators emphasise how far they have come, how close they are.
But at this 11th hour there are, unsurprisingly, conflicting views on the impasse. Western diplomats speak of a small number of political and technical issues to resolve and place the onus on Iran.
But a senior Iranian official lamented that Iran now feels it is in five bilateral negotiations since every country has different "red lines." A senior Iranian official would only speak "of certain changes in the US position" as well as "a walking back" by other countries - they deny that.
It is clear more time is needed - but how much is not clear to anyone. An Iranian official said this wasn't "the 11th hour, but 13th or 14th". This is a process which, from the start, has had a clock all its own.