At approximately 8:55 p.m., a 911 caller reported a brawl at Loyola Park, 1230 West Greenleaf Avenue, in Rogers Park.
According to police dispatch, 15 to 20 people were involved in the melee.
When authorities arrived, they found a black male in his 20s with severe facial injuries.
An ambulance was immediately called to the scene.
At the time of this report, no further details were available.