Giza police said 22 members of Utras White Nights were allegedly involved in trying to assassinate Zamalek Club president Mortada Mansour on Sunday, wounding three of his companions.
Seven suspects were arrested on Monday allegedly in possession of the car and the weapon used in the attack.
They were persuaded by a fugitive member named Sayed Moshagheb to assassinate Mansour for preventing the Ultras from attending the soccer team's training.
Prosecutors are investigating the suspects at their place of detention in order to avoid having the Ultras gather outside North Giza court.
