Iranian president Hassan Rouhani has previously officially assigned the Foreign Ministry to take charge of future nuclear talks with the P5+1 group and the IAEA.
The U.S. and its Western allies suspect Iran of developing a nuclear weapon - something that Iran denies.
The Islamic Republic has on numerous occasions stated that it does not seek to develop nuclear weapons, using nuclear energy for medical researches instead.
Head of the Atomic Energy Organization of Iran (AEOI) Ali Akbar Salehi said on Sept. 15 that he`s optimistic about the further negotiations on nuclear issue between Iran and the P5+1 group (the five permanent members of the UN Security Council plus Germany).
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