From the Posen Fire Department Facebook page:

Please Everyone !!!
Slow Down and Move Over when approaching stopped emergency vehicles. Our Posen Engine 2805 was struck by a vehicle during the overnight hours on I-57 last night (3/30/19). This is the 2nd Fire Engine struck on I-57 in the past 2 weeks in addition to the 2 fatalities involving State Troopers on Chicago Area Expressways. Our firefighters are safe, Thank God, however the offender was injured and transported to the hospital. To all our brothers and sisters out there….be alert and safe!

** Please everyone… we appreciate the concern most people have shown however we will delete any negative comments or theorizing what occurred. It’s a public safety message to yield to emergency vehicles… period…

Posen FD fire engine struck by car on I57 at crash scene

Posen Fire Department photo