Dozens of Egyptians gathered Tuesday in front of the prosecutor general's office in Cairo to protest against orders to arrest five leading activists accused of inciting violence against the Muslim Brotherhood last week in Cairo, DPA reported.
Protests began as leading blogger Alaa Abdel-Fattah, one of the five summoned for investigations, turned himself in.
Protesters carried banners reading "we are all Alaa" and "You will not shut us up."
Abdel-Fattah said on Twitter that he refuses to recognize the proceedings and asked for the case to be referred to an investigative judge. He added that he was questioned over tweets he did not write, but was mentioned in.
The five activists were accused of inciting "violence, the destruction of property and disturbing peace in the events that erupted during the protest in front of the Muslim Brotherhood's headquarters."
More than 100 people were injured when clashes erupted on Friday between Brotherhood opponents and supporters.
The arrests came after the Brotherhood filed a legal complaint against 169 people, including party leaders and politicians, accusing them of involvement in the violence.
Egypt's secular-led opposition accuses Islamist President Mohammed Morsi (a Brotherhood member) of tightening his group's grip on power.