Three people, including a 3-year-old boy, are in critical condition Friday after an apparent gang-related shooting at a neighborhood basketball court in Chicago that left up to 13 people injured, USA Today reports.

At least 10 ambulances were sent to the site in the Back of the Yards neighborhood in southwest Chicago after 10 p.m. Thursday.

Other victims include a 15-year-old, a 17-year-old, and a 33-year-old woman with a gunshot to the back near one shoulder.

Police say the shootings appear to be gang-related, but no arrests have been made.