Iran and world powers have made "important progress" towards a final deal on the Islamic Republic’s nuclear program, a senior Iranian negotiator said Thursday.

Iran and world powers have made "important progress" towards a final deal on the Islamic Republic’s nuclear program, a senior Iranian negotiator said Thursday.

On remarks made by Russian top negotiator that drafting the comprehensive deal is nearly over, deputy foreign minister Araqchi said: “we have made significant progress in drafting the final deal, but, we have not made great progress about its appendixes and the work is still going on.”

The work is very difficult and complicated, Araqchi said. However, he noted that there are still a few weeks left and expressed hope that they will meet the deadline of June 30.

The sixth round of negotiations between Iran and the world powers on drafting a comprehensive nuclear deal will begin in Vienna today.

Delegations from all the six world powers – known as the P5+1 – as well as Deputy EU Foreign Policy chief Helga Schmid will be present in the negotiations.