Two of the candidates standing to be West Yorkshire's Police and Crime Commissioner have branded Chief Constable Sir Norman Bettison's position "untenable" after allegations about his involvement in a police cover-up of the Hillsborough disaster.
Labour candidate Mark Burns-Williamson and Conservative Geraldine Carter have said he should go.
Until recently Mr Burns-Williamson was the Chair of the West Yorkshire Police Authority.
It is understood the Authority will discuss Sir Norman's position at a meeting tomorrow.
He has been referred to the police watchdog, the Independent Police Complaints Commission.
The candidates standing are:
- Mark Burns-Williamson - Labour
- Geraldine Carter - Conservative
- Cedric Christie - Independent
- Andrew Marchington - Liberal Democrat