Egypt's President Pardons Detained Researcher Patrick Zaki
Zaki had been studying in Italy before his detention during a trip home in 2020 over a news article in which he documented life as a Coptic Christian in Egypt.
He will return to Italy on Thursday, Italian Prime Minister Giorgia Meloni said in a statement in which she thanked Sisi for a "very important act."
Sisi's pardon, which was reported by a state news agency and confirmed by lawyers, also included Mohamed El-Baqer, a rights lawyer who represented Egypt's well-known activist Alaa Abd el-Fattah and was arrested in 2019 while attending his client's interrogation.
Zaki's case gained widespread attention in Italy, which had already been jolted by the killing and torture in Egypt of Italian student Giulio Regeni in 2016. Four Egyptian security officials have been charged in Italy over Regeni's disappearance and murder, while Egyptian officials have repeatedly denied involvement.
After Zaki's sentencing on Tuesday, Meloni had said Italy still had confidence over his case, while a U.S. state department spokesman urged Egypt to release Zaki immediately.
The head of Egypt's national dialogue, a state-controlled initiative to debate the country's future, had appealed to Sisi to use his constitutional powers to have Zaki freed as several members of the dialogue's board signaled they were quitting over the verdict.
Zaki, a researcher at the Egyptian Initiative for Personal Rights (EIPR), had served 22 months in pretrial detention before being released in December 2021 pending the completion of his trial. EIPR said he was subjected to torture following his arrest.
His arrest came amid a far-reaching crackdown on dissent under Sisi, who led the overthrow of democratically elected Islamist leader Mohamed Mursi a decade ago before becoming president the following year.
Many of those swept up in the crackdown remain in prison, including senior Muslim Brotherhood figures and Abd el-Fattah.
Authorities have justified the arrests on security grounds.
Since late 2021 Egypt has taken a number of steps that it says are aimed at addressing human rights, including amnesties for some prominent prisoners, but critics have dismissed the moves as cosmetic and say arrests have continued.
"Baqer and Patrick should not have spent one day in jail for their human rights work," EIPR head Hossam Bahgat said in a tweet. "We welcome the news of their pardon and call for the immediate release of thousands still detained in Egypt on political grounds."