Activists in Syria said rare internal fighting broke out Friday between a powerful rebel force and armed residents in the Damascus suburb of Douma.
The Syrian Observatory for Human Rights said the fighting between residents and members of the Islamic Army continued into Saturday.
The observatory said the fighting began when the residents attacked storage houses controlled by a group close to the Islamic Army, and that guards at the houses opened fire, wounding some of the residents.
The Islamic Army controls Douma, which is largely surrounded by forces loyal to Syrian President Bashar al-Assad.
Infighting has weakened the rebels' fight against Assad's regime. But most of the clashes have been in the north, and instances of confrontation in the south have been relatively rare.