"One of the bullets is in his kidney," Lopez said.
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Investigators said the shootout happened in the 1600-block of West Howard Street at about 11:40 p.m.
Relatives of one of the victims say the group was standing near Howard Street and Ashland Avenue, waiting on a party bus, when two vehicles pulled up.
Police said the groups got into an argument, and unknown suspects from inside each car started shooting at the group of party-goers, striking all of them.
Detectives said one of the people standing on the street returned fire, but left before officers arrived.
Moments later, just blocks away, in the 1900-block of West Howard Street, neighbors heard more gunshots
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"It was in the early evening, shots fired. I thought it was still fireworks, actually. I know they carry over the fireworks, but this time, it wasn't," said Cory Lee.
Authorities said a 35-year old man was hit but managed to get himself to the hospital. It's unclear if the two incidents are related.
This afternoon, Chicago police returned to the scene to retrieve bullets that pierced the windows of the local Park District building nearby, as well as an Uber driver's minivan.
Adesanya Asojo lives in a northern suburb, but stayed at a friend's house in the city so he could start driving early Saturday morning.
"I want to take it to the mechanic to see what they can do to it, because driving it around like this is embarrassing, and to me, it doesn't make any sense," Asojo said.
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The other shooting victims, two men and two women, who range in age from 26 years old to 37 years old were recovering on Saturday afternoon. That's some comfort to residents, who are still concerned about their safety.
"They need to clean it up. Even the police, even our area. The kids can't even come to play. This is not safe," Lopez said.
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