In response, former diplomat and liberal politician Mohamed ElBaradei, the leader of the opposition National Salvation Front, which refused a previous invitation for dialogue, asked Morsi "to cancel or at least delay the constitutional referendum until a national agreement is reached."
Egypt is set to hold a referendum on the controversial draft constitution on Saturday, despite the opposition's call for a nationwide protest. Morsi has given the army the power to arrest civilians, calling them to help the police maintain the security of the referendum.