Iran's Foreign Minister Mohammad Javad Zarif has said he is stepping down, in a surprise announcement posted to his Instagram account. Iran's state-run news agency IRNA confirmed the news.
He apologized for "shortcomings" during his time in government.
He also begged pardon for his incapability of continuing his services.
The 59-year-old was educated in the US and holds a PhD in international law from the University of Denver.
He has served as Iran's ambassador to the UN and became foreign minister in 2013 after President Hassan Rouhani was elected.