An Iranian information agency announced Monday that Tehran had barred the International Atomic Energy Agency experts from inspecting Iran's nuclear facilities.
"Nothing special has happened in relations with the IAEA: our cooperation with the agency is continuing under the Nuclear Non-Proliferation Treaty," Ali Larijani said.
He said IAEA inspectors are conducting their inspections in line with existing norms.
Some countries suspect Iran, which lifted its moratorium on uranium enrichment in January 2006, of pursuing a covert nuclear weapons program. Tehran has consistently denied the claims and says it needs nuclear power for civilian purposes.
A senior Iranian parliamentary official said Monday the country's refusal to admit the officials was "the first practical step to restrict cooperation with the agency in response to Resolution 1737, adopted by the UN Security Council."
The UN Security Council unanimously adopted the resolution on Iran on December 23, which imposed sanctions on the country's nuclear weapons programs but allowed officials to make foreign trips and companies to do business abroad.
The resolution banned activities involving uranium enrichment, chemical reprocessing, heavy water-based projects, and production of nuclear weapons delivery systems.
Tehran responded to the resolution by saying it would review its cooperation with the IAEA, and Alaeddin Borujerdi, head of parliament's National Security and Foreign Policy Committee, said Iran had informed the IAEA, which is expected to file a report on Iran's nuclear program February 23, of its decision to ban the inspection.
