The report said that the Islamic Republic had not made "any further advances" in its activities at the country's enrichment facilities and at the heavy water reactor in Arak as of January 20 when the agreement came into force.

The country then started to dilute and oxidise its 196-kg stockpile of 20-percent enriched uranium. Despite making progress, Iran and the P5+1 group - China, Russia, Britain, France, US, Germany - failed to clinch a final nuclear deal by the end of the November 24 deadline during their talks in Vienna.

However, Tehran and the P5+1 agreed to extend their discussions for seven more months till July 1, 2015.They also agreed that the interim deal they had signed in Geneva in November 2013, remained in place during the negotiations.

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