There were back-to-back small fires in Danbury on Friday.  First, firefighters responded to a report of a garage blaze on Osborne Street.  Crews extinguished the flames within minutes, around 3:30pm.  A brush fire extended to a garage, but was prevented from spreading to the house.  Traffic was blocked off at Osborne Street and Locust Avenue during the response.  Minutes later, a call for a fire on Oak Trail was phoned in.  Firefighters found a small pile of leaves burning behind a fence near a shed on the property.  No injuries were reported in either case.  The Fire Marshal's Office is investigating both incidents.