Egypt hits first snag over interim PM, Islamists call more protests
But a presidential spokesman, speaking shortly before midnight, said there were several options for the job and the presidency had to take account of opposition to ElBaradei.
The Nour Party, Egypt's second biggest Islamist force, said it opposed ElBaradei and threatened to withdraw its support for the military-backed overthrow of President Mohamed Mursi on Wednesday, which was the trigger for the bloody unrest.
Losing Nour's backing would significantly weaken the position of the military, removing any Islamist support from the transition process, fiercely opposed by Mursi's Muslim Brotherhood.
The Nour Party, which had endorsed the military's roadmap for a transitional phase leading to fresh elections, followed.
While the ouster of Egypt's first freely elected president was greeted with jubilation on streets crammed with millions of people, his many supporters feared a return to the suppression that the Islamists endured for decades under autocratic rulers.
Mursi's dramatic removal and subsequent violence is the latest twist in a tumultuous two years since the fall of Hosni Mubarak in the Arab uprisings that swept the region.
In central Cairo, protesters clashed late into Friday night with stones, knives, petrol bombs and clubs as armoured personnel carriers rumbled among them.
On Saturday, a Coptic Christian priest was shot dead in Egypt's lawless North Sinai province in what could be the first sectarian attack since Mursi's overthrow, raising concerns about the potential for further religious violence.
A new Islamist group announced its formation in the Sinai peninsula adjoining Israel and the Gaza Strip, calling the army's removal of Mursi a declaration of war on their faith and threatening violence to impose Islamic law.
Newspapers quoted ElBaradei as saying that he expected Gulf Arab monarchies that were hostile to the Muslim Brotherhood's rule to offer financial support to the new authorities.
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