The Boston Police Department has been asked to look into personnel matters raised after three facilities managers for the city’s library system were placed on administrative leave pending an internal investigation, a police spokesman said Wednesday.

The spokesman, Sergeant John Boyle, declined to comment further.

The Boston Public Library disclosed the suspensions for the three employees Tuesday. The workers were placed on leave without pay on July 18, said Lisa Pollack, a library spokeswoman.

She declined to identify the employees or discuss why they were placed on leave.

Elissa Cadillic, president of AFSCME Local 1526, the union representing library employees, said the suspended workers don’t belong to the union. She declined to comment further.


Laura Crimaldi can be reached at laura.crimaldi@globe.com. Follow her on Twitter @lauracrimaldi.