Illinois State Police are investigating a deadly crash involving one of their own troopers in Springfield.

Authorities say it happened around 2:30 early Saturday morning along South 6th Street near Linton Street in Sangamon County. According to a preliminary report, a state trooper was traveling southbound through a green light when the squad car struck a pedestrian who was reportedly bent down in the roadway.

The trooper immediately stopped and rendered aid until emergency crews arrived. The pedestrian was taken to a local hospital, where they were later pronounced dead.

The incident is now under investigation by the Illinois State Police Division of Internal Investigation, as required by state law. Officials say evidence is being processed and interviews are underway.

Once the investigation is complete, findings will be turned over to the Sangamon County State’s Attorney’s Office for review.

No additional information has been released at this time.