About 12:30 p.m., officers on patrol saw an armed carjacking in the 5000-block of South Princeton Avenue, police said. Officers drove after the stolen car until it crashed into a Chevrolet Suburban near the intersection of 55th and Halsted.
A man and boy were in the Suburban at the time of the crash. Witnesses say the 11-year-old victim was thrown from the Suburban and landed in the street. He was taken to Comer Children's Hospital where he was pronounced dead. The man in the SUV was also injured.
Witnesses say the suspect got out of the minivan and ran toward the gas station across the street.
According to witnesses, police were already following the suspect who was driving a stolen vehicle. After the collision, he got out and ran to the gas station where he stole another vehicle, a Toyota Land Cruiser.
Police say he drove that all the way to the western suburbs, where it ran out of gas on I-294 near Oakbrook. He abandoned it and flagged down another driver and carjacked a third vehicle.
Chicago police are looking at video of the suspect and the first collision from security camera at the gas station.
An investigation is underway. No one is in custody.
The Sun-Times Media Wire contributed to this report.