7:11 a.m. Officers were called to 55 Waverley Ave. for the report of a fire alarm activation. Upon arrival, police and the Watertown Fire Department investigated smoke coming from an area between the third and fourth floors of the building. The fire was identified to have started in the trash room of the building and, because of the smoke from the fire, the building’s sprinkler system was activated. <BLOG NOTE: Only the substantial heat from a fire will cause a sprinkler to activate, Not smoke.>