CLAYTON, Mo. (AP) -- Prosecutors in the St. Louis County prosecuting attorney's office have voted to join a police union.

The St. Louis Post-Dispatch reports that prosecutors along with investigators voted by secret ballot Monday to enter the St. Louis Police Officers Association. The association did not release the vote count.

The union represents St. Louis city police officers. St. Louis County police officers are represented by the St. Louis County Police Association.

The vote comes just two weeks before Ferguson attorney Wesley Bell takes over in January as St. Louis County's prosecuting attorney. Bell defeated longtime prosecutor Bob McCulloch in the August Democratic primary.

Wesley Bell looking forward to changes he's planning for STL Co. prosecutor One day after a stunning victory in the Democratic Primary for St. Louis County Prosecutor, Wesley Bell was looking forward to the changes he's planning.

Bell, who ran on a platform of criminal justice reform, is the first black elected to the office.