Three police officers have resigned after an investigation by the Crime and Misconduct Commission (CMC) into drug use within the Queensland Police Service (QPS).

As part of a CMC investigation into alleged cocaine use, listening devices were installed in several police stations on Brisbane's southside.

7News understands three policeman from across the city resigned almost immediately after they were ordered to give evidence at the CMC

The CMC wouldn't confirm if there is evidence the junior officers were under the influence of drugs on duty.

In a statement to 7 news, the CMC says..

"It is finalising an investigation into alleged use of illegal drugs by a small group of police officers."

"The CMC can make no further comment at this time."

It's not yet known if any of the former police officers have been charged with criminal offences.

Latest From 7News