The IAEA also announced on Sunday that Tehran was ready to “provide information and explanations” for experiments in a type of detonator that the agency said could be used to trigger a nuclear explosion, according to Associated Press news agency.

The agency said in a statement that there had been “constructive technical meetings” within a framework that was agreed last November, according to Reuters news agency……

Sunday’s announcement would be a potentially significant step forward, as the investigation into suspected atomic bomb research has been deadlocked for years because of what the West sees as Iran’s stonewalling of the IAEA.

It could also send a positive signal to separate negotiations between Iran and six world powers, due to start on February 18, that are aimed at reaching a broader diplomatic settlement of the decade-old nuclear dispute…….http://www.aljazeera.com/news/middleeast/2014/02/iran-offers-more-nuclear-sites-inspection-20142915171859936.html