The United States is deeply concerned that Iran has yet to provide the International Atomic Energy Agency with information about uranium enrichment.
US State Department spokesman Ned Price said about it.
Earlier Raphael Grossi, head of the IAEA, said that Iran had not yet confirmed the peaceful nature of its nuclear program to the agency.
He stressed that Tehran had yet to explain itself about the enriched uranium particles previously found at its nuclear facilities.
“It is becoming increasingly difficult to extend the temporary agreement on inspections as Tehran and the world powers try to salvage the nuclear deal. We cannot continue to limit the inspectors’ ability to conduct inspections and at the same time pretend that there is trust,” Grossi stressed.