Summary: Fire and emergency units responded to an activated fire alarm at 1540 Duffy Lane, near Little City Drive in Palatine, Cook County, Illinois. Initial reports indicated no visible fire or smoke and no evacuation was necessary. A secondary alarm was reported at 1760 Algonquin Road, but no activation or hazard was found at that location, which was vacant. Maintenance staff were notified, and the fire alarm system was left in a trouble state with appropriate signage posted. The incident was resolved without injuries or property damage.