Police identified two of the victims as teenagers, but did not clarify their status or age on Sunday morning.
A suspect is in police custody after a deadly mass shootout at a bowling on Saturday evening.
Police identified the suspect as 37-year-old Duke Webb during a press conference on Sunday morning.
Police said they believed Webb was the only one responsible for Saturday’s shooting.
WATCH: Rockford Police Chief Dan O’Shea gives the latest on the shooting
Rockford Police Chief Dan O’Shea said Saturday that he did not think any officers fired their weapons, but the shooter was active when police arrived at the scene.
Related: Chicago Weekend Gun Violence Shot 12, 3 Killed Across City
Rockford Police in a tweet at around 7:15 pm asked to avoid the public area during the following investigation
E. Active shooter investigation near Don Carter Lane on State Street. Avoid the area.
– RockfordillPolice (@RockfordPD) 27 December 2020
O’Shea said Rockford Police received a call for shots being fired at Bowling Alley at 6:55 pm
Republican US Rep. Adam Kinzinger, whose district includes Rockford, tweeted, “He was praying for the victims and their families tonight after the heinous attack in our community.”
Praying for the victims and their families tonight after the heinous attack in our community. As we continue to learn more and hold the responsible party responsible, I want to thank @RockfordPD For his quick action in catching the suspect. # IL16
– Adam Kinzinger (@RepKinzinger) 27 December 2020
Rockford is about 80 miles northwest of Chicago.
ABC News and the Associated Press contributed to this report.
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