(VOVworld) – Iran and the P5+1 resumed talks in Vienna Wednesday toward a final comprehensive deal before the June deadline. Observers predict this new round of talks, set to last at least 2 days, will be tough.

Talks between EU Political Director Helga Schmid, Iran’s Deputy Foreign Minister Abbas Araqchi, and US Under Secretary for Political Affairs Wendy Sherman took place ahead of the meeting between Iran and 6 world powers.

EU Political Director Helga Schmid seats next to Iran's Deputy Foreign Minister Abbas Araqchi at the opening of nuclear talks on March 5, 2015 in Montreux, Switzerland. (Photo: AFP)

A final comprehensive deal is sought that will curb Iran's nuclear program in exchange for sanctions relief.