Negotiations between Iran and the five permanent UN Security Council members plus Germany over the Iranian nuclear program will be held between October 14 and 16 in Vienna, Anadolu agency reported.
During the negotiations, European Union's Catherine Ashton is expected to meet with Iran's foreign minister.
On October 15, U.S. Secretary of State John Kerry is also expected to attend the negotiations.
The previous negotiations were held in New York for 10 days, but in the end they were concluded without any meaningful progress.
There are serious disagreements between the two sides over Iran's uranium enrichment plans; number of centrifuges; heavy water reactor and revoking of sanctions on Iran.
According to a temporary agreement, Iran is expected to conclude the negotiations until November 24 of this year.