Liberal opposition leader Mohamed ElBaradei has been chosen as Egypt's new prime minister, the Tamarod campaign behind the protests that toppled Islamist president Mohamed Morsi said on Saturday after talks with the country's interim president.

A military source confirmed to AFP that the former UN nuclear watchdog chief was to be sworn in as premier later on Saturday, three days after the army overthrew Morsi.

The official MENA news agency said ElBaradei was in talks with interim leader Adly Mansour.

UPDATE: The Associated Press reported that ElBaradei's appointment has not been confirmed, after objections from the conservative Salafi el-Nour party. A spokesperson for interim President Adly Mansour said on Saturday that "consultations" into the matter were still ongoing.