Former president Mohamed Morsi was remanded for 30 days pending investigations over spying and jailbreak charges.
Investigation judge overseeing the case Hassan Samir ordered copying all the files of the case and its investigations and send them to the Prosecution-General for further probe.
The decision was made in light of a memo by the Supreme State Security Prosecution, which is investigating the espionage case.
Morsi is accused of spying for Palestinian movement Hamas to carry out hostile acts in Egypt, attack police institutions, break into prisons and set fire to Wadi Natrun jail, where Morsi was kept when the 2011 January Revolution broke out.
Meanwhile, the Supreme State Security Prosecution renewed the detention of Morsi's chief secretary Refaa Tahtawi for 15 days over charges of spying for Hamas and leaking confidential information to the group while still in office.