The deeply politicized fans have frequently clashed with police inside and outside stadia. Many have also been prominent participants in the country's 2011 uprising that forced long-time autocratic President Hosni Mubarak to step down.
In last year's deadly football riot in Port Said last year, 74 people were killed, mostly Al-Ahly fans.
In March this year, the club's fans rampaged through the heart of Cairo, storming the Egypt federation headquarters before setting it ablaze.
They were furious about the acquittal of seven police officers while death sentences against 21 alleged rioters were confirmed in a trial over the deadly stadium riot.