The driver of the vehicle in the crash that killed three children and a teen in Chatham, Illinois, may have had a medical emergency, Illinois State Police said.

Illinois State Police said the driver who crashed into a building housing an after-school program in Chatham, Illinois, killing four, was not intoxicated at the time of the crash.

The driver of a car that barreled through a building used for a popular after-school camp in central Illinois, killing three children and a teenager, was not under the influence of drugs or alcohol and may have had a medical emergency,