Egyptian state media reports say ousted president Mohamed Morsi will be put on trial on charges of inciting violence and murder.
The public prosecutor is quoted as saying Morsi will be tried with 14 other suspects. No date has been announced.
The charges stem from fighting between Morsi supporters and opponents outside the presidential palace last December. Seven people were killed.
Morsi has not been seen in public since the military drove him from power on July 3. The pro-Islamist Muslim Brotherhood, which is demanding Morsi's reinstatement, set up two large protest camps in Cairo.
A police raid on those camps in in late July killed hundreds of civilians. The Brotherhood puts the death toll in the thousands.
The military has set up an interim government. It promises to hold new elections and amend the Islamist-drafted constitution.
Interim President Adly Mansour has announced a 50-member panel to discuss proposed changes to the constitution.
Liberals and secularists make up the majority of the panel. Five women and Catholic and Coptic church officials also are included. They are set to hold their first meeting September 8.