Iran's representative to the International Atomic Energy Agency (IAEA) said that the agency should consider "realities" about Iran's nuclear program in order to achieve "success", official IRNA news agency reported on Wednesday.

"The success of talks on Iran's nuclear program depends on agency's compliance with the realities," Ali-Asghar Soltanieh was quoted as saying.

"If somebody raises some allegations, he should present the documents about them (to us)," he said, adding that besides, subjects raised over Iran's nuclear issue should be dealt with one by one.

Above all, the Islamic republic should be assured that, after resolving the issues, Iran's nuclear case would be closed, he maintained.

Describing the recent talks between Iran and the IAEA as " progressive", Soltanieh said that "If the considerations and expectations related to our national security are met, we are ready to finalize it (a deal) and to remove the ambiguities."

In the previous meetings between Iran and the IAEA, some differences were solved but there are still some points on which Iran insists, he added.

After the two-day talks ended here last Thursday, both Iran and the IAEA announced that a new round of talks would be held on Feb. 13 in Tehran.

Iran and the IAEA failed to reach an agreement on the investigation of the disputed nuclear program, but Iran said the negotiations were a step forward.

Iran and the West are locked in a bitter dispute over the former's nuclear ambitions. The West accuses Tehran of developing nuclear weapon under the cover of peaceful nuclear program, a charge Iran has consistently denied.