Two men who opened fire on a crowd of people gathered for a baby shower, wounding six people, including two children, may have acted in relation for an earlier gang conflict, police said.
Authorities have only "shards of information" about what happened at the family gathering in Chicago because witnesses are not cooperating, a police spokesman said, but investigators hope the serious nature of the children's injuries will prompt someone to talk.
"This is a very tragic incident. You have two young children, an 8-year-old and a 10-year-old, clinging to life," Chicago police spokesman Anthony Guglielmi said.
At least a dozen people were gathered outside a home decorated with balloons for the baby shower when two armed men approached on foot and began shooting, Guglielmi said.
The gunmen fired multiple rounds and ran away down an alley, he said.