Irving Fire Department responded to a major accident on December 24th at Irving Blvd and Pioneer Rd. They arrived on-scene at 10:37 am. An MICU (Medical Intensive Care Unit) was hit by a truck in the intersection while transporting a critical patient to the hospital. Four firefighters and the patient were inside the unit at the time. The driver refused transport to the hospital. One of the firefighters in the ambulance was injured, but it was determined to be non-life threatening. The ambulance was able to continue to the hospital with the patient.