Morsi, a leading figure in the Islamist Muslim Brotherhood movement, had been serving lengthy jail sentences since his ouster from power.
Wednesday's attack killed dozens, the latest incident in a full-blown insurgency posing the biggest challenge yet to President Abdel-Fattah el-Sisi's rule.
The ousted leader still faces more accusations including leaking state secrets to Qatar, espionage, and conspiring with Palestinian group Hamas, Iran's Revolutionary Guards, and Lebanon's Hezbollah.
At least one army officer was killed by gunmen in Cairo on Friday morning and around 90 Islamists arrested as regime opponents prepared for the largest demonstrations planned in months.
As insurgency continues in Egypt's North Sinai, the military is doubling the size of the security zone bordering Gaza, wiping out the town of Rafah in the process.
Eight men, including two members of the Muslim Brotherhood and an Islamist preacher, were on trial for allegedly torturing and sexually assaulting a lawyer during the 2011 Egyptian revolution.
Egyptian Election Amid Political Crisis and Insurgency
Three Al Jazeera employees have been sentenced to seven years behind bars after a controversial trial featuring some very weird evidence.
The law in Egypt refers to a rapist as, “whosoever has sexual intercourse with a female without her consent,” but it doesn't cover penetration short of full sex or with things that aren't body parts.
Seven suspects between the ages of 15 and 49 have now been arrested for sexual assault, the Ministry of Interior said.
His presidency begins as the country works to recover from the economic crisis after 2011's Arab Spring and the ouster of two presidents.