Iran is saying a Sunday visit by the U.N. nuclear chief to Tehran is aimed at implementing the current landmark nuclear agreement, not probing allegations of Iranian nuclear misconduct.

The official IRNA news agency on Saturday quoted Behrouz Kamalvandi, spokesman for Iran's nuclear agency, as saying Yukiya Amano's goal in Tehran is to advance Iran's nuclear agreement.

A Friday Associated Press report said that Amano is probing allegations that Iran worked on nuclear weapons in the past. When asked about the report, Kamalvandi replied, "Some international media intentionally publish reports aimed at special purposes."

Iran and the world powers reached a historic deal in July to curb Tehran's nuclear program in exchange for lifting sanctions. Iran has consistently maintained that its nuclear research is meant solely for peaceful applications.