A man opened fire at a group of people Monday evening at a park packed with Memorial Day picnickers, killing two in the group and wounding three, police said.
Police were looking for the man, who argued with the victims at the park about 7:30 p.m., fired shots and fled in a vehicle, police spokeswoman Anne E. Schwartz said.
Witnesses said they heard at least 10 shots, prompting the hundreds of people in South Shore Park on the Lake Michigan shore to scatter, screaming.
The shooting happened next to a playground, Schwartz said.
“It was a very chaotic scene, a lot of people running around when we came,” she said.
A 31-year-old man and a 17-year-old boy were killed, she said. Two people — a 23-year-old woman and a 34-year-old man — were in serious condition, and a 21-year-old man was treated and released.