Crews were called to a road traffic collision in Warrington, where a car had left the road and collided with a house.
Firefighters isolated the utilities to the house and inspected the property with a thermal imaging camera and a gas monitor.
All occupants of the property were accounted for. Seven casualties were assessed at the scene, with three taken to hospital.
A cordon was put in place, and the incident was handed over to the police.
