West Yorkshire Police is investigating after allegations made by former Northumbria Police Chief Constable Sue Sim.
Sue Sim has made a complaint against the force which she was in charge of.
No details have been released surrounding the nature of the complaint however a statement has been released.
Northumbria Police confirmed “A complaint has been received from Mrs Sim which is being looked at independently by West Yorkshire Police. It would be inappropriate for Northumbria Police to make any comment while the matter is being investigated.”