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,

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.

Four students of the program, girls 7 to 18 years old, were killed in the crash in Chatham. Six other people were treated for injuries.