A source close to the Russian team of negotiators in Geneva told the Tasnim News Agency that the Swiss city will host the next round of nuclear negotiations between Iran and the Group 5+1 (the five permanent UN Security Council members plus Germany) before January 20, 2015.

It will be held at the level of deputy foreign ministers, he said.

At the end of Wednesday talks at Geneva’s President Wilson Hotel, the two sides agreed to resume the negotiations next month.

It came less than a month after the parties decided to extend for more 7 months a self-imposed deadline for signing a comprehensive agreement on Tehran’s civilian nuclear work.

Iran and the Group 5+1 (also known as the P5+1 or E3+3) wrapped up a week of intensive nuclear talks in Vienna on November 24 without reaching the long-awaited deal.

Negotiations between Iran and the sextet aim to hammer out a final agreement to end more than a decade of impasse over Tehran’s peaceful nuclear program.