Two people were trapped in the wreckage after three cars were involved in a crash in Normanton.
Emergency services were called to the A655 Normanton Bypass shortly after 10.45pm last night.
A West Yorkshire Fire Service spokesman said three cars had been involved in the collision.
He said firefighters from Normanton and Castleford worked to free two people - one male and one female - who had been trapped.
The two people freed from the wreckage were then taken to hospital by ambulance, he said.