Iran's foreign minister says it is unlikely to reach a final nuclear accord with world powers by a November deadline.
Parliament's news website quoted Mohammad Javad Zarif as saying that even if a general agreement is reached by the deadline, the two sides will require more time to discuss details.
''Hence, it is unlikely to reach a final conclusion before a four-month span,'' he was quoted as saying.
Iran and the P5+1 group - the US, Britain, France, Russia and China plus Germany - in July extended their nuclear talks until November.
Western powers have long suspected Iran is secretly pursuing a nuclear weapons capability alongside its civilian programme, charges denied by Tehran.