Mohamed ElBaradei, a former U.N. nuclear agency chief, will be named Egypt's interim prime minister later on Saturday, a presidency source says.
Interim leader Adli Mansour summoned ElBaradei to the presidential palace on Saturday, the state news agency reported, without giving more details.
Meanwhile, a senior official in the Freedom and Justice Party, the Muslim Brotherhood's political wing, said on Saturday he rejected Mohamed ElBaradei's appointment as Egypt's interim prime minister.
"We reject this coup and all that results from it, including ElBaradei," he told Reuters at an Islamist gathering in northern Cairo.
ElBaradei was among liberal leaders who opposed Islamist President Mohamed Morsi, ousted by the military on Wednesday. The overthrow prompted often violent protests across the country.
Thirty-six Egyptians have been killed and more than 1,404 others wounded in clashes between opponents and supporters of ousted President Mohamed Morsi and in clashes between pro-Morsi protesters and security forces.
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