More than half escaped from Wadi El-Natroun jail, where 13 prisoners were killed.
Prosecutors on Thursday released new charges against Morsi, accusing him of “collaborating with foreign organisations to commit terrorist acts in Egypt and revealing defence secrets to a foreign country” during 2005-2013.
Most of the other Brotherhood defendants are already in prison, having been arrested since Morsi's ouster.
Brotherhood officials have in the past dismissed the allegations of conspiracy, calling them “absurd”.
Last month, Morsi went on trial on charges of incitement in connection with clashes between his supporters and opposition protesters outside the presidential palace in December 2012.
Morsi was deposed by the military on July 3, after millions of people rallied across the country demanding his resignation.
Latest World News
