(BBC) – On Feb, 18, 2005 Russian President Vladimir Putin said that recent moves by Iran have convinced him that Iran is not trying to build nuclear arms.
He said Moscow would continue working with Tehran in all fields, including nuclear power, adding that he had accepted an invitation to Iran.
His comments came at a meeting in Moscow with chief Iranian nuclear negotiator Hasan Rohani.
Moscow is helping Iran build a nuclear reactor - a project which has been heavily criticized by the US.
The Americans accuse Iran of seeking nuclear weapons.
Iran denies this, saying her nuclear development program is purely for peaceful, energy-generating purposes.
Under an agreement announced on Thursday and due to be signed this month, Moscow will supply Tehran with the nuclear fuel it needs.
The spent fuel will be returned to Russia. This was the last issue delaying the start of operations at the Russian-built reactor at Bushehr, in southern Iran.
The US believes that the Bushehr reactor - when completed - could enable the Iranians to extract weapons grade plutonium.
The BBC's Steve Rosenberg in Moscow says Russia has close ties with Iran, dating back to Soviet times, and it is determined to continue co-operation despite US opposition.
After his talks with President Putin on Friday, Mr Rohani said Russia's role may prove "rather useful" in moving ahead discussions on Iran's nuclear program with Germany, Britain and France.
The three have offered to replace a heavy-water nuclear reactor - which can be used to make weapons-grade nuclear material - with a light-water reactor.
Low grades of uranium are used for nuclear reactor fuel, but higher grades can be used in atomic bombs.
Tehran suspended uranium enrichment temporarily in November, as part of the dialogue process.
Construction of the Bushehr Power plant was started in 1975 by German companies, but the work was stopped in 1979 after the Islamic revolution of Iran. Because of their hostilities, Iran has every right not to trust western countries which have not honored their signatures and have failed to fulfill their obligations.
The Bushehr Nuclear Power Plant started adding electricity to the national grid on Sep, 3, 2011 at 40% capacity,