Excerpts from NBCChicago.com:

Three people were injured in a crash between a car and an Aurora Fire Department ambulance early Tuesday in Naperville. Shortly before 3:30 a.m., the ambulance collided with a Toyota Camry.

Authorities arrived at the scene to find the ambulance on its side in the intersection. It was on its way back to the station at the time of the crash and there was no patient inside.

The Camry had pulled off the road into the parking lot by the time emergency crews arrived. The 52-year-old woman who was driving the Camry and the two Aurora Fire Department paramedics were all taken to Edward Hospital in Naperville.