A dryer fire forced evacuation of several units at 471 Silver St. on Sunday. The fire was reported at about 2:47 p.m. , and companies arrived to find smoke showing from a four-story mill multi-unit apartment building. The source of the fire was the first-floor laundry room. Firefighters discovered a fire in a commercial stacked dryer, which activated the sprinkler system. Firefighters finished extinguishing the fire and removed the affected equipment from the building. Companies remained on scene to clear smoke that had traveled throughout the first- and second-floor common areas. Cause of the fire is under investigation, but possibly caused by a clogged exhaust pipe. Damages are estimated at about $5,000.