An Arab-Iranian poet and human rights activist, Hashem Shaabani, has been executed for being an "enemy of God" and threatening national security, according to local human rights groups.
Shaabani and a man named Hadi Rashedi were hanged in unidentified prison on January 27, rights groups have said.
Shaabani, who spoke out against the treatment of ethnic Arabs in the province of Khuzestan, had been in prison since February or March 2011 after being arrested for being a Mohareb, or "enemy of God".
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Last July, the Islamic Revolutionary Tribunal found Shaabani and 13 other people guilty of "waging war on God" and spreading "corruption on earth".
The 32-year-old was the founder of Dialogue Institute and was popular for his Arabic and Persian poems. In 2012, he appeared on Iran's state-owned Press TV, where human rights groups say he was forced to confess to "separatist terrorism".