Fars News Agency has cited a source from EU foreign policy chief office as saying that Iranian chief nuclear negotiator Saeed Jalili and EU foreign policy chief Catherine Ashton are scheduled to meet in Istanbul on May 15^th.

EU foreign policy chief Catherine Ashton (R) and Iran's chief negotiator Saeed Jalili (L) walk before their meeting in the garden of the Iranian Consulate in Istanbul September 18, 2012. (Photo: Reuters)

The latest round of talks was held in Kazakhstan in early April. Ashton represents the P5+1 group including the US, UK, France, China, Russia, and Germany, who are jointly talking with Iran about its controversial nuclear program.