Muslim Brotherhood members on trial

A woman prays for her relative during the trial of Rabaa el-Adaweya protest case at Cairo Police Academy in Cairo, Egypt on March 21 2017 ( Moustafa El-Shemy/Anadolu)

Judge Hasan Ferid (C) is seen during the trial session of Rabaa el-Adaweya protest case at Cairo Police Academy in Cairo, Egypt on March 21, 2017. ( Moustafa El-Shemy – Anadolu Agency )

A general view of Cairo Police Academy during the trial session of Rabaa el-Adaweya protest case in Cairo, Egypt on March 21, 2017. ( Moustafa El-Shemy – Anadolu Agency )

General Guide of the Egyptian Muslim Brotherhood Mohammed Badie (L) arrives at Cairo Police Academy during the Rabaa el-Adaweya protest case in Cairo, Egypt on 21 March 2017 [Moustafa El-Shemy/Anadolu Agency]

General Guide of the Egyptian Muslim Brotherhood Mohammed Badie (2nd L) hugs with his sister as he arrives at Cairo Police Academy during the trial session Rabaa el-Adaweya protest case in Cairo, Egypt on March 21, 2017. ( Moustafa El-Shemy – Anadolu Agency )

Vice chairman of the Freedom And Justice Party Muhammed el-Biltaci (2nd R) is seen during the trial sessionof Rabaa el-Adaweya protest case at Cairo Police Academy in Cairo, Egypt on March 21, 2017. ( Moustafa El-Shemy – Anadolu Agency )

Osama Mohamed Morsi (L), the son of ousted Egyptian president Mohamed Morsi hugs his baby as he arrives at Cairo Police Academy during the trial session of Rabaa el-Adaweya protest case in Cairo, Egypt on March 21, 2017 ( Moustafa El-Shemy – Anadolu Agency )

Osama Mohamed Morsi (C), the son of ousted Egyptian president Mohamed Morsi is seen at Cairo Police Academy during the trial session of Rabaa el-Adaweya protest case in Cairo, Egypt on 21 March, 2017 [Moustafa El-Shemy/Anadolu Agency]