AP� Austria�s chancellor on Wednesday asked visiting Iranian President Hassan Rouhani for �full clarification� of the case of a Vienna-based Iranian diplomat suspected of involvement in a plot to bomb an Iranian opposition rally in Europe.

Rouhani was in Vienna, where his country�s nuclear agreement with world powers was drawn up three years ago, to promote the deal�s survival after the withdrawal of the United States.

A day earlier, Austrian officials announced that they plan to revoke the legal immunity of Vienna-based diplomat Assadollah Assadi.

Assadi was detained Sunday near the German city of Aschaffenburg on a European arrest warrant after a couple with Iranian roots was stopped in Belgium and authorities reported finding powerful explosives in their car. The website of the Austrian Foreign Ministry lists Assadi as a counselor at the Iranian Embassy.

Belgian authorities accuse Assadi of being part of a plot to set off explosives at a huge annual rally of the Mujahedeen-e-Khalq group in neighboring France, and want him extradited.

French police also detained a man of Iranian origin in France, and a judicial official said on Wednesday that a European arrest warrant was issued for the man in question, identified as 54-year-old Mehrdad A. It was not immediately clear when he would be extradited to Belgium, where he normally resides. The judicial official wasn�t authorized to publicly discuss an ongoing investigation and demanded not to be named.

Following the arrest of the Iranian diplomat, Iran�s ambassador was summoned to the Austrian foreign ministry on Monday.

Chancellor Sebastian Kurz said he discussed the issue with Rouhani during their long-scheduled meeting on Wednesday.

�We expect full clarification and I would like to thank you, Mr. President, that you have assured us of support for this clarification,� said Kurz, speaking alongside Rouhani.

In his comments to reporters, Rouhani didn�t mention the case. He and Kurz didn�t take questions, and there were also no questions allowed at a news conference earlier Wednesday with the Iranian and Austrian presidents.

Iran�s foreign minister called the allegations of a foiled extremist plot a ploy as Rouhani embarked on a visit to Europe.

On Wednesday, Iran�s semi-official Tasnim news agency reported that the man arrested in Belgium was a member of the Mujahedeen-e-Khalq.

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Geir Moulson in Berlin and Elaine Ganley in Paris contributed to this report.