Illinois State Police, Chicago investigators and federal officials are searching for a 34-year-old man who they say is suspected in a series of carjackings, including one that killed an 11-year-old boy.

The man from Beach Park hasn't been charged, but police say he's wanted for three separate carjackings Friday and Saturday as well as a series of robberies and "criminal incidents" in Chicago and Wisconsin.

No arrests had been made as of Monday morning.

One of Saturday's carjackings killed Donovan Anthony Turnage. The fifth-grader was on his way to get a haircut Saturday after a carjacked vehicle being pursued by police crashed into his family's car. The boy's father was seriously hurt.

Authorities say the carjacker allegedly stole another vehicle and got away.

Police are investigating the chase.