Russia has expressed optimism about the prospects of Iran-P5+1 nuclear talks, saying the negotiations are close to fulfilling Iran's demand that all of its inalienable rights as a signatory to the Nuclear Nonproliferation Treaty (NPT) be safeguarded.

“Despite the difficult course of the negotiating process, a possibility is emerging to satisfy in full all integral rights of Iran as a member state of the Nuclear Nonproliferation Treaty, including the right to enrich uranium,” Russia's Foreign Ministry said on Thursday.

The ministry said the nuclear negotiations process between Iran and the five permanent members of the UN Security Council plus Germany has also provided opportunities for the removal of US-led sanctions against the Islamic Republic.

It further urged all countries involved in the nuclear negotiations to show a political will to reach a deal over Iran’s “exclusively peaceful” nuclear energy program.

“We presume all parties in the talks will show political will to reach a final, mutually acceptable agreement that would allow to fully restore the international community's trust in the exclusively peaceful character of Iran's nuclear program,” said the Russian ministry.

Iran and the five permanent members of the United Nations Security Council - China, Russia, Britain, France, and the United States - plus Germany will resume their nuclear talks on the sidelines of the annual gathering of the UN General Assembly in New York in September.

The two sides are discussing ways of reaching a final agreement over Tehran’s nuclear energy program.

They clinched a landmark interim deal in Geneva, Switzerland, on November 23, 2013. The agreement, which took effect on January 20 and expired six months later on July 20, has been extended until November 24.

Under the deal, dubbed the Geneva Joint Plan of Action, the six countries undertook to provide Iran with some sanctions relief in exchange for Iran agreeing to limit certain aspects of its nuclear activities.