President Hassan Rouhani's Chief of Staff Mohammad Nahavandian left Tehran for Vienna to join Iran's nuclear negotiators, Al-Alam News Network reports.
Nahavandian shared a photo of a flying plane in his Instagram on Friday and asked Iranian people to pray for him in his mission.
It is believed that Nahavandian is going to Vienna on a special mission to offer necessary consultations to Iran's negotiating team.
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