The shooting took place in the 2600-block of West 46th Place at about 5:17 p.m., police said.
A 25-year-old man and a 29-year-old woman were killed in the shooting. Authorities have not released the identities of the two victims.
A 19-year-old woman was shot in the right leg and a 25-year-old man suffered gunshot wounds to the right hip and right elbow, police said. They were both taken in good condition to Mount Sinai Hospital.
Six more people were listed in good condition at Stroger Hospital, police said. A 23-year-old man and two 26-year-old men were all shot in their right legs; another 26-year-old man was shot in both ankles; a 25-year-old woman was shot in the right arm; and another 23-year-old suffered bullet fragment wounds in his right leg.
Police are now keeping their eyes on the neighborhood for any more violence. The shooting occurred as large group of people gathered to remember the victim of another shooting early Sunday morning, police said.
Police said 26-year-old Daniel Cordova, a gang member, was shot and killed at 4:30 a.m. Sunday in the same Brighton Park neighborhood, police said.
Authorities were expecting some sort of retaliation and they had extra patrols in the area to try to prevent it.
Community activist Andrew Holmes said it's important to track down where these assault rifles are coming from:
"The city deserves to know where these guns are coming from and where they were purchased. There are serial numbers on these military-style guns. Someone is hand delivering them, someone is driving these guns here or someone is purchasing these guns illegal," Holmes said.
Shooting - 2629 W. 45TH . Dep Supt Navarro responding. Incident believed to be a gang related retaliation for early shooting in Brighton Pk— Anthony Guglielmi (@AJGuglielmi) May 8, 2017
Sun-Times Media Wire contributed to this report.