This handout photo taken and released on December 9, 2021 by the EU delegation in Vienna - EEAS shows flags of participating states during a meeting of the joint commission on negotiations aimed at reviving the Iran nuclear deal in Vienna, Austria. (Photo: REUTERS/File photo)

The European Union's foreign service said the meeting would be attended by representatives of China, France, Germany, Russia, Britain and Iran.

"Participants will continue the discussions on the prospect of a possible return of the United States to the JCPOA and how to ensure the full and effective implementation of the agreement by all sides," the External Action Service's statement said.