Parallel court cases have been adjourned in Cairo against ousted Egyptian ruler Hosni Mubarak and top leaders of the Muslim Brotherhood related to killings during the 2011 and 2013 protests.
Mubarak is facing a retrial for failing to prevent the killing of more than 800 protesters in the 2011 uprising that led to the fall of his regime.
The retrial of Mubarak was adjourned to September 14.
Muhammad Badie (right) sits in a police car after being arrested by security forces in Cairo.
The August 25 court session came after Mubarak was released from prison and placed under house arrest three days ago.
Mubarak's conditional release on August 22 came in connection with a separate corruption case.
Mubarak, now 85, was forced to resign in February 2011 following massive protests against his 30-year rule. He has been in custody since April 2011.
Meanwhile, a separate trial of Egyptian Muslim Brotherhood chief Muhammad Badie and his deputies that was scheduled to start on August 25 has been postponed until October 29 for reported security reasons.
According to security sources speaking on condition of anonymity, Badie and his deputies were not brought to court because police feared protesters could attack the trucks transporting them.
The men were due to face charges of inciting deadly violence against anti-Islamist protesters before the army's overthrow of Islamist President Muhammad Morsi on July 3.
However, Atef Galal, a lawyer for one of Badie's deputies, told the media that the trial is political and its outcome predetermined.
"I've said before that this is a political case, not a criminal case at all," Galal said. "On the procedural level, the evidence for this case is burnt and completely lost. A standardized accusation has been created, claiming that the Brotherhood leaders, and all those supporting or sympathizing with them, have incited bloodshed. Today, this case has been postponed until October 29 for security reasons and the suspects did not attend, which means that this decision was already made before this session and not today."
The August 25 hearings came amid political instability in the wake of Morsi's ouster, followed by a bloody crackdown on his Muslim Brotherhood movement in which more than 1,000 people, including about 100 soldiers and police, have died.
The Brotherhood says the toll is much higher. Security sources say at least 2,000 members of the Brotherhood have been arrested in recent days.
With reporting by AFP and Reuters