Excerpts from Fox32Chicago.com:

Five people, including four firefighters, were hospitalized Sunday when the brakes failed on a Chicago Fire Department fire truck, sending it into a vehicle at an intersection in Chatham on the South Side.

Engine 122 out of 101 E. 79th St., was traveling north on King Drive with its emergency lights activated about 7 a.m. when its brakes failed as it passed through the intersection at 75th Street. The pumper hit an eastbound vehicle, injuring a woman in the driver’s seat who was taken to the University of Chicago Medical Center in critical condition. Chicago fire officials have since said that she has been stabilized.

Four firefighters were also injured in the crash. Three have already been released from the hospital and the fourth was expected to be released later Sunday.

From CFDMedia on Twitter:

Shortly after 7am, E122 was involved in an accident with a vehicle containing one passenger at 75th & King Drive. 3 CFD members have been discharged and a 4th CFD member is expected to be released later today. Civilian passenger is stable at U of C. Incident under investigation.