Cairo - Egypt's top prosecutor has accused the former president of passing state secrets to Iran's Revolutionary Guard.
He said in a statement on Sunday that Mohammed Morsi and 35 other members of the Muslim Brotherhood were conspiring to destabilise the country and were co-operating with foreign groups, including Palestinian Hamas and Lebanon's Hezbollah.
Morsi appeared briefly in court for Sunday's hearing, the second in a trial which began on 16 February. The next hearing is set for 26 February.
Defence lawyers walked out of the courtroom at the previous hearing in protest over the fact that Morsi and other defendants were being held in a glass sound-proof cage.
Morsi was ousted by the military following millions-strong protests after just one year in power.