Chicago police have arrested four men in connection to a Chicago shooting that left 13 people, including a 3-year-old boy wounded, authorities said Tuesday. Two of the four suspects -- Tabari Young, 22, and Bryon Champ, 21 -- fired shots in the incident, police said.
Chicago police say two people have been charged in connection with a shooting spree last week at a Chicago park, but neither of them pulled the trigger.
Kewane Gatewood, 20, and Bryon Champ, 21, are each charged with three counts of attempted murder and aggravated battery with a firearm, police said in a statement.
In all, 13 people were shot Thursday at the Back of the Yards neighborhood on Chicago's South Side. Police said while Gatewood and Champ "played significant roles in the shooting, neither is believed to be a shooter, and the investigation into the incident continues."
The shooting victims included 3-year-old Deonta Howard and two 15-year-olds. All 13 victims survived.
Deonta's grandmother made plea to those fueling violence in Chicago.
"Y'all out here killing these innocent people, kids, parents, grandparents, mothers, fathers: It's got to stop. You need to stop," Semehca Nunn said.
An assault-style rifle with a high-capacity magazine was used in the shooting, which appears to be gang-related, Chicago Police Superintendent Garry F. McCarthy said Friday.
Chicago bans some semiautomatic weapons and high-capacity magazines and restricts handguns.
The FBI's annual crime report last week showed Chicago had 500 homicides in 2012, up from 431 in 2011 and more than any other American city. Chicago officials have said homicides this year are below the 2012 pace.
Still, Chicago does not have the highest homicide rate in the United States. That distinction belongs to Flint, Michigan, with one homicide for every 1,613 residents, according to the FBI data. Detroit is close behind, with one killing for every 1,832 residents.
In 2012, the number of violent crimes increased by 0.7 percent, compared with the previous year, according to the FBI figures.
CNN's Mariano Castillo and David Simpson contributed to this report.