Iran is not responding to questions about its nuclear activities, a report from the International Atomic Energy Agency said, SIA reports quoting the AA.
The country is two months late with answers to questions in the continuing agency inquiry into suspected nuclear weapons research.
The delayed response may have a negative impact on the negotiations between Iran and the group of countries comprised by United States, Britain, China, France, Germany and Russia, according to the report, which was released on Friday.
These negotiations are supposed to wind up on Nov. 24, but the failure to respond to agency queries may delay the talks.
The group of countries maintain that Iran is secretly developing nuclear weapons in its uranium enrichment program, while Iran says that the program is for peaceful use of nuclear energy.
The group of countries have said that no final agreement will be reached until the agency issues a satisfactory ruling on its inquiry.