The award-winning Egyptian photojournalist Mahmoud Abou Zeid, who is widely known as Shawkan, has been released after five years in prison, ONA reports citing BBC.
Shawkan was arrested in 2013 while covering a deadly crackdown by security forces on a sit-in by supporters of ousted President Mohammed Morsi.
Last September he was convicted in a mass trial and handed a five-year jail sentence, which he had already served.
Amnesty International said he was detained solely for doing his job.
"Mahmoud Abou Zeid's long overdue release brings to an end a painful ordeal for him and his family," Najia Bounaim, the human rights group's Middle East and North Africa director, said on Monday.
"As a prisoner of conscience, he should never have been forced to spend a single minute behind bars - let alone five-and-a-half years."