A suspicious package sent to Toronto Police Headquarters has been tested and found not to be hazardous or a danger to the public.

Constable Allyson Douglas-Cook tells CBC Toronto that a box came into the mailroom at approximately 11 a.m. When the package was being processed, a white powdery substance was found in the box.

The mailroom was then closed off from the rest of the building as a precaution, but a full evacuation is not in effect.

"There were approximately five employees in the room at the time and none of them have complained of any kind of medical situation," Douglas-Cook said.

Douglas-Cook later added on Twitter that Grenville Ave., located at the rear of the building, was also closed as a precaution.

Toronto fire's HAZMAT team as well as the The Chemical Biological Radiological Nuclear (CBRN) unit of the Toronto Police Service responded to the scene. CBRN tested the substance and found nothing dangerous.