The second day of nuclear talks between Iran and six world powers headed by EU foreign policy chief Catherine Ashton started on Wednesday in Almaty, Kazakhstan.
Iranian media reported that before the next round of the talks, Ashton and Iran's chief nuclear negotiator Saeid Jalili would have a bilateral meeting.
Ashton's spokesman Michael Mann described the first day of the talks between Iran and the six powers - Britain, China, France, Germany, Russia and the United States - as "useful."
There has been no assessment by the Iranian side yet of Tuesday's talks but both sides made it clear that they did not expect a final settlement of the decade-old dispute but were preparing the ground for a gradual settlement process.
According to Mann, the six states have presented Iran with a new offer which he said would address international concern about the peaceful nature of the Iranian nuclear programmes.
The Iranian side on Tuesday examined the offer, whose contents have not yet been disclosed, with political leaders in Tehran and were due to respond on Wednesday.
The three main demands the powers made of Iran were the suspension of its programme of enriching uranium to 20 per cent, the shipping of the already enriched uranium to a third country, and the closure of its new enrichment site at Fordo, south of Tehran.
Tehran has so far ruled out closing Fordo, and was expected to reiterate its refusal in Almaty.
Iran has indicated that it would be ready to compromise on other demands if its right to a peaceful nuclear programme were acknowledged.