"Coercive decisions are unacceptable, we work on the enrichment program just for nuclear fuel cycle and we will achieve that goal at full steam," said Larijani when lecturing to a group of college students and staffs in Tehran.

"The UN Security Council should not believe that they can amuse us with candies and our country is allergic to suspension. If they want to oppress Iran, we will definitely reconsider our cooperation with the International Atomic Energy Agency (IAEA)," he added.

The top Iranian nuclear official also warned the United States against military attacks on Iran, saying Washington was "bright enough to avoid such a mad thing."

"If they (the United States) want to harm us, we will also harm them and the Iranian nation is serious," he stressed.

Earlier on Sunday, Foreign Ministry spokesman Hamid Reza Asefi said that Iran would not surrender under western threats and stresses.

"We are ready to resolve this issue through dialogue, but we won't talk with them and surrender under threats and stresses," said Asefi at the weekly press conference.

Meanwhile, the spokesman also said that Iran's act would correspond to the performance of the UN Security Council.

"If the other side takes radical measures, we have to react radically. If they take rational decisions, of cause we will be also rational," said Asefi, adding that retreating from the nuclear Non-Proliferation Treaty (NPT) and the IAEA was currently not on Iran's agenda.

IAEA chief Mohamed ElBaradei submitted a report on Friday to the UN Security Council, saying Iran had ignored the council's non-binding demand to suspend all uranium enrichment activities by the Friday deadline.

However, Mohammed Saeedi, deputy head of Iran's Atomic Energy Organization, denied there were any negative points in the report,but said that Iran was currently working on extraordinary nuclear equipment (centrifuges) for its uranium-related activities and would not give up enrichment.

On Saturday, Larijani sent a letter to ElBaradei, saying that if Iran's nuclear issue remained in the IAEA, Iran was ready to cooperate with the agency and help resolve the nuclear standoff.

The foreign ministers of 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 the response to ElBaradei's report.

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.

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

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