Eleven people were taken to hospital after a four-car pile-up during rush hour on the M6 near Carnforth.
Lancashire Fire and Rescue Service said crews from Lancaster, Silverdale and Carnforth - 14 firefighters altogether - were called to the scene close to junction 35 of the northbound carriageway at around 5pm on Friday, November 29.
On arrival, the crews found multiple casualties were already being treated by paramedics, but nobody was trapped in any of the vehicles.
Initial reports that one of the cars was on fire later proved unfounded, John Taylor, Lancashire Fire and Rescue Service spokesman told the Guardian.
The crews helped ambulance crews deal with the injured and assisted with administering first aid.
Motorway police closed the M6 for several hours, causing queues as far back as junction 33 at Galgate.
One apparent witness said that three brothers rushed to the aid of a family who were trapped in one of the cars after they heard children crying in the wreckage.
Writing on the Guardian website, the witness reported that the car in question was in a pool of petrol after the collision ruptured the fuel tank.
Despite being hurt themselves, the men broke a window to rescue the youngest child after releasing him from his child seat, before reaching inside to free two other children, they explained.
Their father, who was driving, was found unconscious and the mother was distressed and in shock, they added.
One of the three lanes reopened at around 6pm before the other two were cleared a short time later.