Two cars crashed at the intersection of Colches and Canterbury Streets, Casino, before 8am today, Wednesday, June 25.
Casino VRA Rescue crew was called after reports that people were trapped in one of the cars.
The rescue crew used battery-powered and hydraulic rescue equipment to remove more than one car door so paramedics could treat the people inside the car.
The rescue crew also helped get a person out of the car to be treated.
Four people were injured. Three were taken to Lismore Base Hospital with chest and neck injuries.
NSW Police are continuing investigations into the incident.
The information in this report was provided by emergency services.