Talks between Iran and world powers at expert level on the country's disputed nuclear programme ended Tuesday evening in Istanbul, dpa reported.
Michael Mann, a spokesman for the European Union foreign policy chief Catherine Ashton, confirmed to dpa that the talks had ended, but did not give details of the results.
"As foreseen in Moscow, the next step is that there will be a conversation between Mrs Ashton and (Iran's chief nuclear negotiator Saeid) Jalili," Mann said.
Before the talks, Iran's Foreign Ministry spokesman Ramin Mehmanparast reiterated Iran's right to a nuclear programme. "Our position is clear: We want clear and official recognition of our rights to a peaceful nuclear programme," Mehmanparast said.
The so-called 5+1 nations - China, Germany, France, Britain, Russia and the United States - suspect Iran of building a nuclear weapon and are pressing the Islamic republic to halt its nuclear enrichment activities.
Tehran insists that its nuclear programme is of a peaceful nature.
Following a breakdown in talks between the two sides in Moscow in mid-June, the leading negotiators - European Union foreign policy chief Catherine Ashton and Iran's chief nuclear negotiator Saeid Jalili - agreed to move ahead with expert-level contacts in the interim.