Vienna talks end with no results

Iran's lead negotiator in high-stakes nuclear talks with world powers in Vienna said on Friday that discussions were moving forward only "very slowly and with difficulty", Reuters reports.

"It's a good atmosphere and discussions are moving forward in a spirit of goodwill, but they are moving very slowly and with difficulty," the IRNA news agency quoted Abbas Araqchi as saying.

The sides have not issued a joint statement after the talks yet.

Iran and the six international mediators are aiming for July 20 as the day of the signing of the final agreement.