An Egyptian prosecutor in Fayoum governorate south of Cairo ordered on Saturday the detention of 10 members of the Muslim Brotherhood for 15 days, pending investigations for allegedly inciting violence on Friday, which left several injured.
According to state news agency MENA, an 11th defendant was sent to his family instead of being detained because he is under 18 years old.
Clashes erupted in Fayoum on Friday when Brotherhood members allegedly attempted to break into the security directorate building during a march organised by the pro-Morsi National Alliance to Support Legitimacy.
Police used teargas to disperse the attempt and the two sides exchanged birdshot.
At least six police suffered from temporary suffocation, including three conscripts. An injured police officer was released on Saturday from the medical insurance hospital.
Another 13 injured were treated in a hospital owned by the secretary general of the Freedom and Justice Party in Fayoum.
Al-Jazeera television earlier reported 28 injuries in the clashes, including a police officer.