The representative of Iran and the P5+1 take part in the talks in Moscow, June 18, 2012.
Deputies to the top negotiators of Iran and the six major world powers of the P5+1 are set to hold talks in the Turkish city of Istanbul.
Ali Baqeri, the deputy secretary of Iran's Supreme National Security Council (SNSC), and Helga Schmid, the deputy to the EU foreign policy chief, will discuss ways to reduce differences in the talks on Tuesday.
The two sides will decide on the date and venue of the next round of talks between Iran and the P5+1 - Britain, China, France, Russia and the United States plus Germany, if the expert-level discussions bear results.
The deputy-level talks will be held behind closed doors and without the presence of reporters.
SNSC Secretary Saeed Jalili and EU foreign policy chief Catherine Ashton will have a telephone conversation at the end of the Tuesday meeting to discuss the details of the negotiations.
According to a statement by the office of the EU foreign policy chief, Ashton and Jalili will keep in contact “about the prospects for a future meeting at the political level.”
Iran and the P5+1 agreed to hold the expert-level talks during their negotiations in the Russian capital, Moscow, in June.
The Moscow meetings came after three sessions of plenary talks in Baghdad in May and an earlier round of negotiations in Istanbul in mid-April.
The two sides had, prior to the Istanbul talks, held two rounds of negotiations, one in Geneva, Switzerland, in December 2010, and another in Istanbul in January 2011.