Rockford Police Officers responded to a call of shots fired in the 100 block of 15th Avenue.
Officers on scene finding 6 shell casings and two unoccupied vehicles struck by gunfire.
Police say that video footage revealed that a suspect arrived in a vehicle on Broadway, exited from the passenger side, and approached the parked vehicles, looking inside.
The suspect left, and upon returning a short time later, opened fire on the vehicles and then fled northbound through the alley.
Police are still investigating.