An Iranian nuclear agency official has denied claims made by a top lawmaker that Tehran had begun installing 3,000 centrifuges at an uranium enrichment plant, Iran’s state-run news agency reported.Hossein Simorgh, spokesman of Iran’s Atomic Energy Organisation public relations department, said “no new centrifuges have been installed in Natanz,” referring to the nuclear facility in central Iran, the official Islamic Republic News Agency reported late Saturday.Earlier on Saturday, lawmaker Alaeddin Boroujerdi said Iran was currently installing the 3,000 centrifuges, underlining that the country would continue to develop its disputed nuclear programme despite UN sanctions.It was not immediately clear why the two officials made contradicting statements. Iranian officials have in recent weeks said the country was moving toward large-scale enrichment involving 3,000 centrifuges, which spin uranium gas into enriched material.Iran’s Foreign Ministry spokesman Mohammad Ali Hosseini refused to elaborate on the discrepancy on Sunday, saying only that the contradicting remarks were a “technical matter.”“Let the organisation elaborate on it at a convenient time,” Hosseini added.Hosseini also said that Russia’s national security adviser, Igor Ivanov, arrived in Tehran on Sunday for talks with top leaders, including President Mahmoud Ahmadinejad and Ali Larijani, the country’s nuclear negotiator.The UN Security Council last month voted unanimously in favour of imposing limited sanctions on Iran after it ignored earlier demands to halt enrichment. Iran faces the prospect of additional sanctions unless it stops enrichment by the end of a 60-day period that ends next month.Enriched uranium is used to fuel nuclear reactors and to make nuclear weapons, and large scale use of centrifuges makes it possible to produce more enriched uranium in a shorter period.The United States and its allies believe that Iran is using its nuclear programme as a cover to produce an atomic weapon. Iran has repeatedly denied the allegations, saying its programme is only for peaceful purposes including generating electricity.International Atomic Energy Association head Mohamed ElBaradei said recently he believed Iran planned to begin work in February on a uranium enrichment facility underground. The subterranean facility is intended to protect the nuclear project from attack.There has been speculation that Iranian leadership might launch the centrifuges installation at Natanz next month to celebrate the 28th anniversary of the Islamic Revolution that brought the clerical leadership to power. Iran ultimately plans to expand its programme to 54,000 centrifuges.In enrichment plants, centrifuges are linked in what are called cascades. For now, the only known assembled centrifuge cascades in Iran are above ground at Natanz, consisting of two linked chains of 164 machines each and two smaller setups. Meanwhile, three inspectors from the IAEA who arrived in Iran on Saturday were scheduled to visit Natanz, Iranian state-television reported.Iran last week barred 38 inspectors from the UN nuclear watchdog because they came from countries that voted for sanctions on Iran. State television did not give the nationalities of the three inspectors, and the IAEA could not confirm their arrival in Iran.Foreign Minister Manouchehr Mottaki said Iran’s decision last week to bar the entrance of the IAEA inspectors from countries whose governments voted in favour the UN sanctions resolution was within Iran’s legal rights.