Iran now is working on extraordinary nuclear equipment for its uranium-related activities, a ranking official told the state television on Saturday.

"The International Atomic Energy Agency (IAEA) has been told that we are researching on different types of equipment, I can tell you it's not the P-2 centrifuge that you thought, it's another device which is more advanced," said Mohammad Saeedi, deputy head of Iran's Atomic Energy Organization.

"We will continue our enrichment program," he reiterated, indefiance of a UN demand to halt its uranium enrichment program.

Centrifuges are used to enrich uranium for nuclear energy, but also can produce atomic weapons stuff.

Saeedi made the comments one day after Mohamed ElBaradei, chief of the International Atomic Energy Agency (IAEA), submitted a report on Iran's defiance to the UN demand, which called on Iran to suspend its uranium-related activities by Friday deadline.

Iran announced earlier this month that it had produced low-grade enriched uranium by launching 164 centrifuges at the uranium enrichment facility in the central town of Natanz.

That marked a technical leap in the process for nuclear power plant construction, which immediately aroused strong international concern.

The UN nuclear watchdog has prompted calls from Western powers for tougher Security Council action against Iran.

Foreign ministers of the five permanent members of the UN Security Council -- the United States, Britain, France, Russia and China -- plus Germany are scheduled to meet in New York on May 9 to discuss response to ElBaradei's report.

Iran has been insisting that it would not give in to pressures, reiterating its nuclear program is fully peaceful.