Egypt's Suez military court sentenced on Monday Muslim Brotherhood leader Mohamed Mongey to ten years of imprisonment on charges of inciting violence and vandalising military property in August.
Egypt's interim government has launched a crackdown on the 85-year-old Islamist group following the popularly-backed military ouster of Islamist president Mohamed Morsi – who hails from the Brotherhood – in July.
Hundreds of the group's leaders and members have been arrested since Morsi's ouster.
The arrest campaign widened after 14 August, when security forces forcibly dispersed the two pro-Morsi protest camps in Cairo and Giza, leaving hundreds dead and over a thousand injured.
Many of the detained Muslim Brotherhood leaders and members face charges of inciting violence during clashes that took place in the months leading up to Morsi's ouster.
Controversial exceptions allowing military trials for civilians have remained a topic of debate during the transitional period.
Earlier in September, a Suez military court handed down a life sentence to a Muslim Brotherhood member and sentenced 50 others to jail on charges of attacking military soldiers.