The Volunteer Penfield Fire Company received a report of a Mobile Home on fire this morning at 4:46 on Fondiller Ave.  Immediately following the dispatch updates reported people trapped in the home.  The first arriving assistant chief declared a working fire with people trap.  Engine 372 was first fire apparatus on scene and made an attempt at a rescue.  As the firefighters made entry into the mobile home the conditions deteriorated quickly and crews were forced out.  There were a total of three fatalities in this fire.  Crews remained on location working the scene for quite some time.