Javid Dehghan was arrested in 2015 and later convicted of being one of the leaders of the Pakistan-based Jaish al-Adl militant group, which has been involved in several violent attacks in Iran.
Iranian authorities on Saturday hanged Javid Dehghan Khalad, a suspected terrorist, for murder, abduction and links to the Sunni militant Jaish al-Adl (Army of Justice) group, according to the Iranian judiciary's website.
Dehghan was put to death early in the morning in the restive southeastern province of Sistan-Baluchestan, the local Mizan Online news agency reported.
Dehghan, also knows as Mohammad Omar, had been found guilty of carrying out "armed action against the state," the website said. He was also found to have been involved in the killing of two Revolutionary Guards' members in 2015, as well as leading a raid to abduct five border guards, one of whom was killed, it added.
Iran hanged Dehghan despite international calls for the execution of the ethnic Baluch to be halted.
"We urge the authorities to halt the imminent execution of Javid Dehghan, to review his and other death penalty cases in line with human rights law," the Geneva-based Office of the United Nations High Commissioner for Human Rights wrote on Twitter on Friday.
"We strongly condemn the series of executions – at least 28 – since mid-December, including of people from minority groups," it added.
London-based rights group Amnesty International alleged Dehghan's trial was "grossly unfair" with the court relying on "torture-tainted confessions."