Nine policemen died in the attack in Malawi village south of Cairo on August 14, 2013, the same day security forces broke up two massive sit-ins by Morsi supporters in the capital, killing more than 700 of them.
Morsi, the country's first civilian, and freely elected, president had been ousted by the army a month previously amid unrest fuelled by his divisive one year in power.
The court in the southern city of Asyut sentenced 108 people in absentia to life in prison, meaning 25 years behind bars.