"We are, of course, still hopeful that some agreement is going to be reached within a reasonable time frame, although we have to recognise the fact that the window of opportunity could be closed any anytime," IAEA Director General Rafael Grossi said, speaking to European Parliament committees via webstream.
He said he had also warned Iran that the country was not being transparent enough about its nuclear activities.
"In the last few months were able to identify traces of enriched uranium in places that had never been declared by Iran as places where any activity was taking place," he said.
