The convicts have been accused of holding illegal protests, committing acts of riots and violence that killed some citizens and attempted to kill others, storming public and private properties and other charges.
The pro-Brotherhood protests were held following the coup against the first democratically elected Egyptian President Mohamed Morsi in July 2013.
Hundreds of Brotherhood leaders, members and supporters, including Morsi himself and the group's top chief Mohamed Badie, are currently in jail. Many have received death sentences and life imprisonments over various charges varying from inciting violence and murder to espionage and jailbreak.
The former President Mohammad Morsi is currently serving a 20-year prison sentence over inciting deadly clashes between his supporters and opponents in late 2012 and a 25-year jail term over leaking classified documents to Qatar.
Since Morsi's ouster, Egypt has been facing a wave of attacks that have killed hundreds of policemen and soldiers as well as civilians.
Egyptian forces have killed hundreds of anti-government elements and arrested thousands during the country's so-called anti-terror war declared by Abdel-Fattah al-Sisi, the army chief who ousted President Morsi.
Abdel-Fattah el-Sisi was Army General when he led coup against Morsi, later he assumed the title of Field Marshall.
Egyptian judicial system has become a joke
Not surprisingly, in January this year CNN quoted an Egyptian attorney as saying that Egypt is using death sentences to settle scores.
Human-rights advocates say the alarming numbers recorded by the Egyptian Coordination for Rights & Freedoms and the Initiative for Personal Rights are shocking -- but the stories behind them are even more harrowing, the CNN said, adding:
What happened to four families from the northern city of Kafr el-Sheikh is a case in point. After more than a year of campaigning to have their loved ones' death sentences commuted in a case clouded by allegations of flaws in Egypt's judicial system, they received phone calls directing them to collect their relatives' bodies early on January 2.
Tellingly, an Egyptian kangaroo court in February 2016 sentenced a four-year-old child to life imprisonment. The child, Ahmed Mansour Qurani Ali, was convicted on four counts of murder and eight counts of attempted murder. The Egyptian military admitted the mistake only after the story had already circled the globe.