Egypt on Saturday executed a supporter of the Muslim Brotherhood for a murder committed during riots in mid-2013, Al Jazeera reported.

The execution marked the first death sentence carried out against a supporter of the banned Muslim Brotherhood under President Abdel Fattah Al-Sisi.

In a statement on its Facebook page, the Interior Ministry said that Mahmoud Hassan Ramadan Abdel-Nabi had been hanged for an incident where children were thrown from a building during protests in 2013 against the overthrow of President Mohammed Morsi.

Security sources have described Ramadan as a “radical Islamist” who is not officially a Brotherhood member, according to Al Jazeera.

Since the Egyptian army ousted the Brotherhood’s Morsi in July 2013, there has been a crackdown on Brotherhood supporters in the country.

Egyptian courts have sentenced hundreds of alleged Brotherhood supporters to death in recent months, many in mass trials condemned by foreign governments and rights groups as violating international law.

Saturday’s execution came a month after Egypt’s high court upheld the death sentence against Ramadan. Most of the other death sentences are still under review in a complex system of legal appeals.

In one of the most dramatic scenes of the upheaval following Morsi’s fall captured on video, Ramadan threw someone off a rooftop during clashes in Alexandria’s Sidi Gaber district. An Al-Qaeda flag was seen tucked into the back of Ramadan’s trousers.

57 others were sentenced to 15-25 years in the case, according to Al Jazeera.

Last week, an Egyptian court sentenced top Muslim Brotherhood leaders, including the group’s spiritual leader Mohammed Badie, to life in prison, for the killings of police officers and civilians during an attack on the group’s Cairo headquarters in June 2013.