Iranian Foreign Minister Manouchehr Mottaki has arrived in Spain, where he will hold talks on the Tehran Declaration and Iran's nuclear program with Spanish officials, Press TV reported.
Mottaki will also discuss subjects of mutual interest with Spanish Foreign Minister Miguel Angel Moratinos and other high-ranking officials during the two-day visit.
Earlier, Mottaki said Iran is preparing a response to the Vienna group's request for talks on the Islamic Republic's nuclear program.
Iran says Turkey and Brazil should take part in the nuclear negotiations.
The Vienna Group, comprised of the United States, Russia, France, and the International Atomic Energy Agency (IAEA), was formed to work out a fuel swap deal for Tehran's research reactor.
Mottaki said on Sunday that Iran is ready for talks with the Vienna Group over the fuel swap deal brokered by Brazil and Turkey, the Fars News Agency reported.
The Vienna Group says that the first condition for the talks is that Iran must halt uranium enrichment to the 20 percent level.
However, during a press conference in Tehran in late June, Mottaki stated that Iran would only produce the fuel "when we need it, and will stop production when we don't."
He also dismissed the new sanctions imposed on Iran by the European Union and the US as big mistakes, saying that the sanctions will only harm trade relations between Iran and the West.
Iran says it has its own preconditions for the resumption of talks, after the major powers rejected the tripartite Tehran Declaration.
The foreign ministers of Iran, Turkey, and Brazil signed a declaration in Tehran on May 17, according to which Iran would ship 1200 kilograms of its low-enriched uranium to Turkey to be exchanged for 120 kilograms of 20 percent enriched nuclear fuel rods to power the Tehran research reactor, which produces radioisotopes for cancer treatment.
The nuclear declaration gives Iran a guarantee since the low-enriched uranium is to be stored in Turkey and would be returned if Iran does not receive the 20 percent enriched nuclear fuel within one year.
On June 28, Iranian President Mahmoud Ahmadinejad outlined the new conditions for negotiations with the Vienna Group.