Aided by the building’s sprinkler systems, firefighters quickly put out a fire at the Walgreens drugstore on Route 9 on last Tuesday night. Merchandise in the store sustained “extensive” fire and smoke damage, but the building itself did not sustain major damage, according to the Fire Department. Everyone got out of the building uninjured. The state fire marshal’s office is investigating the source of the fire. Firefighters went to the store at 8:40 p.m. Tuesday and encountered heavy smoke inside the building. The sprinkler system had kept the fire from becoming worse, the Fire Department said. It took firefighters about 10 minutes to extinguish the blaze. The store was closed Wednesday while Walgreens cleaned up.