Cairo: Supporters of Egypt's ousted president Mohamed Morsi called on the Egyptian people to protest against the army Friday.
The National Alliance to Support Legitimacy, consisting of 33 Islamic movements, including the Muslim Brotherhood, Wednesday asked people to protest after the Friday prayer, Xinhua reported.
The alliance did not mention the venues for their rallies.
Egypt has witnessed unprecedented violent clashes since security forces dispersed two major pro-Morsi sit-ins in the country a week ago. Till now, nearly 1,000 people have been killed across the country, including some 100 policemen.
The alliance has failed over the past three days to organise massive marches, while the Egyptian authorities have detained the Muslim Brotherhood's top leader Tuesday over inciting violence and killing anti-Morsi protesters.
Islamist groups in Egypt have been accusing Morsi's ouster in early July as a "military coup".
Egypt has been undergoing a democratic transition since the fall of president Hosni Mubarak two years ago. In July this year, Mohamed Morsi, the first democratically elected president, was deposed by the armed forces after only one year in office.
The constitution was suspended and an interim government was then installed.