BANGOR — Federal health and safety officials say they’re investigating worker conditions at Acadia Hospital in Bangor in response to an employee complaint.

The Bangor Daily News says the investigation by the Occupational Safety and Health Administration started about a month ago amid allegations that policy changes, understaffing and inadequate training have led to unsafe working conditions.

OSHA officials are not commenting on the specifics of their investigation. Officials at Acadia, a psychiatric hospital with about 600 employees, say they are cooperating fully with the probe.

Acadia nurse Katie Gardner says employees have been injured in recent months due to policy changes that leave staff more vulnerable to physically disruptive or vulnerable patients.