Three people were taken to hospital after the car they were travelling in flipped onto its roof.
The accident happened at 6.30am this morning on Abbey Lane, Luddenden.
The occupants were trapped and had to be freed by emergency services.
All three suffered minor injuries and were taken to Calderdale Royal Hospital. The Western Area Roads Policing Unit said they do not know how the accident happened and how the car came to rest on its roof.