Earlier the same day, Hassan Rowhani, secretary-general of Iran's Supreme National Security Council, rejected the UN nuclear agency's demands.
"The Islamic Republic of Iran never committed to any kind of suspension [of nuclear activities] at any time. And you know that in the statement of Tehran, this point was mentioned very clearly -- the suspension is voluntary by the Iranian government as part of confidence-building measures with the IAEA," Rowhani said. "Therefore, the Islamic Republic of Iran has never committed to any suspension. We already have declared and we are repeating it again today that any kind of obligation to suspend [uranium enrichment] activities is not acceptable to us."
Rowhani also said Iran will stop allowing UN inspectors to make snap inspections at its nuclear facilities if Iran is referred to the UN Security Council for possible sanctions.
Iran has adamantly denied U.S.-led charges that it is secretly trying to develop nuclear arms.