The foreign ministers of Iran and five world powers still party to the 2015 nuclear deal will meet in Vienna on Friday for talks on the troubled accord, Tehran and Moscow said.
The top diplomats of Britain, China, France, Germany and Russia will join Iranian Foreign Minister Mohammad Javad Zarif in the Austrian capital, Iran's official IRNA news agency reported, for their first talks together on the deal since Washington pulled out earlier this year.
During the meeting the ministers will discuss an "incentive package" the European Union is offering to try to persuade Iran to stay in the agreement, IRNA reported.
The meeting will seek "solutions to preserve the Iran nuclear deal after the illegal US action to withdraw," it said.
In Moscow, deputy foreign minister Sergei Ryabkov told Russian news agencies 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 Trump," he said.
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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 Switzerland 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 percent -- above the level permitted in the deal -- "within days" if the agreement falls apart.