TEHRAN (ISNA)- Iranian Foreign Minister Mohammad-Javad Zarif and his US counterpart John Kerry resumed talks in Vienna as experts negotiations are also underway.

Iranian Deputy Foreign Minister Hamid Baidi-Nejad is leading the Iranian side in negotiations between experts of the two sides.

Iran and G5+1 negotiators chose to continue negotiations without setting a deadline day.

Foreign ministers of Iran and the six countries (the US, Britain, China, Russia, France and Germany) have been in Vienna since Thursday for talks.

The two sides say that many issues have been settled, but still there are still difficulties.

Sources close to negotiating sides said that over 90 percent progress made in drafting technical annex.

US Energy secretary Ernest Moniz is absent in Vienna on Friday.

By ISNA