Egypt's opposition Batel – Void in Arabic – campaign yesterday criticised what it described as "unjust death sentences against national symbols and statesmen".
"The recent death sentences by the regime are nothing but an order to the Egyptian people to kneel down to the ruler of tyranny, and forget about the dream of change, freedom and justice," the group said in a statement.
"Are Egyptians satisfied with the execution of innocent and honourable people such as the former youth minister Osama Yassin," the statement added.
The group called on all "free patriots not to remain silent in the face of injustice by the regime."
Batel was launched in March 2018 to oppose the amendments to the Egyptian Constitution, which paved the way for incumbent President Abdel Fattah Al-Sisi to potentially stay in power for as long as he wishes.
On Monday, Egypt's highest criminal court upheld the death sentences of 12 people who took part in pro-democracy protests in a 2013, including leaders of the now outlawed Muslim Brotherhood.