Talks on Iran nuclear deal to resume in Vienna on Monday

A camera directed on Palais Coburg, where closed-door nuclear talks take place in Vienna, Austria (Michael Gruber/AP)

Negotiators from Iran and five world powers that are trying to revive a tattered 2015 nuclear deal will resume talks in Vienna next week, the European Union has said.

The talks were adjourned nearly a week ago after a round marked by tensions over new demands from Tehran. They are chaired by EU diplomat Enrique Mora.