At 2109 hours, while standing by at Clayton, Kent County 911 alerted Smyrna (44), Clayton (45) and Engine Co. 85 for a high life hazard fire alarm at the Smyrna High School on Duck Creek Parkway in Smyrna. Engine Co. 85 arrived at 2112 assuming the first due engine assignment with our own hydrant with nothing evident on the alpha and delta side. Crews from Engine Co. 85, 44, and 45 investigated a pull station activation. Crews found a malfunctioning pull station and Command 44 held the assignment to Engine Co. 45. Milton crews returned to Station 45 to finish the cover assignment. Units responding Engine-Tanker 85-2, Engines 44-2 and 44-2, Ladder 44, Squad 45, 44-9. 44-17 had the Command.