Foreign ministers and senior diplomats from Britain, China, France, Germany and Russian Federation held talks on Friday with their Iranian counterpart, Mohammad Javad Zarif, in Vienna for the first time since US President Donald Trump announced he was abandoning the nuclear deal and moving to re-impose sanctions on Iran.

The top diplomats of Iran and five world powers meet Friday as Tehran seeks assurances it will benefit economically from the nuclear deal despite the USA withdrawal from the pact. Washington has since told countries they must stop buying Iranian oil from November 4 or face financial measures.

The statement sent a positive signal, while the meeting was shadowed by Iran's dissatisfaction with the European Union (EU)'s offer to secure its economic interests by anti-sanction measures.

The meeting was chaired by EU High Representative Federica Mogherini and attended at the ministerial level by China, France, Germany, Russia, Britain and Iran.

Friday's statement lists key fields to support Iran to secure its economic interests, including "the maintenance and promotion of wider economic and sectoral relations with Iran; the preservation and maintenance of effective financial channels with Iran; the continuation of Iran's export of oil and gas condensate, petroleum products and petrochemicals; the continuation of sea (including shipping and insurance), land, air and rail transportation relations", manly to shield the country's backbone of the economic sector from USA sanctions.

"If the process of the European foreign ministers' meeting in Vienna, which is aimed at encouraging Iran to cooperate, is promising, we will continue our cooperation", he said.

Rouhani, who this week visited Europe to rally support for the nuclear deal s survival, said in a phone call with Macron that the package "does not meet all our demands", reported Iran s IRNA state news agency.

"The Iranians expect the others to say what we are going to do to keep the deal alive".

Iran has suffered worsening financial turbulence since US President Donald Trump abandoned the accord in May.

Iran, which strongly denies ever seeking to build a nuclear bomb, has warned it could resume uranium enrichment for civilian purposes if the deal collapses.

Iran's economy is already suffering from the sanctions that Washington re-imposed after walking away from the nuclear agreement, and the United States has threatened to punish companies from other nations that continue doing business with Iran. The rial currency has fallen, prices have risen and the country has been hit by street protests and strikes.

Six people were arrested in Belgium, France and Germany, while the opposition group blamed the Iranian regime for the alleged plot.