"This is our expectation from the Russians to take advantage of their diplomatic capacities in this regard," Hosseini told a press conference.

Iran will keep its collaboration with the IAEA since it owns the best authority to consider the issue, Hosseini asserted.

He said that if Iran's nuclear issue returned to the IAEA, the ambiguities being posed would be studied better than the past, but he failed to elaborate what kind of ambiguities he referred to.

The spokesman also referred to Iran's latest agreement with the IAEA, which demanded access to materials related to the country's uranium enrichment activities, saying this should be interpreted as the continuation of Iran's cooperation with the IAEA.

IAEA board of governors on Feb. 4 adopted at an emergency meeting a resolution by 27 against three with five abstentions to report Iran's nuclear issue to the UN Security Council.

The resolution touched off prompt hails of the United States, the European Union (EU) and even Russia, a longtime supporter of Tehran over its nuclear dispute.

Tehran has slashed at such decision for a long time since Iran's leaders rejected all the UN requests or resolutions concerning suspension of uranium enrichment in the past nine months.

Iran's parliament had warned earlier this month that it would ban the entry of IAEA inspectors into Iran in case the UN Security Council issues any sanction resolution against the country.

However, Iran still agreed to an IAEA request to take further environmental samples from the equipment already sampled at a technical university, confirmed IAEA chief Mohammad ElBaradei on Saturday.