TEHRANinfo-icon: The foreign ministers of Iraninfo-icon and five worldinfo-icon powers still party to the 2015 nuclear deal will meet in Vienna on Friday for talks on the troubled accord, Tehran and Moscowinfo-icon have said.

The top diplomats of Britaininfo-icon, Chinainfo-icon, Franceinfo-icon, Germanyinfo-icon and Russiainfo-icon would join Iranian Foreign Minister Mohammad Javad Zarif in the Austrian capital, Iran's official IRNA news agency reported, for their first talks on the deal since Washington pulled out earlier this year.

During the meeting the ministers would discuss an "incentive package" the European Unioninfo-icon is offering to try to persuade Iran to stay in the agreement, IRNA reported.

The meeting would seek "solutions to preserve the Iran nuclear deal after the illegal USinfo-icon action to withdraw", it said.

In Moscow, deputy foreign minister Sergei Ryabkov told Russian news agenciesinfo-icon that the meeting aimed to "prevent the disintegration" of the accord and to "protect the interests of economic actors".

"We should send a message to Washington showing how much the position of countries participating in the deal differs from the stance of (US President) Donald Trumpinfo-icon," he said.

The announcement of Friday's meeting came with Iranian President Hassan Rouhani in Europe to rally support for the deal.

Rouhani, accompanied by Zarif, was in Switzerlandinfo-icon on Tuesday and due to head on Wednesday to Vienna, where the accord was signed in 2015.

Trump unilaterally pulled out of the agreement two months ago, to the ire of the other signatories which along with the European Union have continued to back the accord.

Iran has warned it is ready to resume uranium enrichment to 20 per cent -- above the level permitted in the deal -- "within days" if the agreement falls apart.