WFR Responds to a residential structure fire at approximately 720pm, WFR's initial response included Battalion 1, Engine 4, Engine 1 and Medic 4. Crews arrived on scene to find smoke and flames showing from a single-family residence bedroom window. Firefighters quickly initiated an aggressive attack, containing the fire to a bedroom and hallway preventing further spread throughout the home. All occupants were confirmed to be safely accounted for; however, a family pet was found deceased during a secondary search. No firefighter or civilian injuries were reported. The cause of the fire is still under investigation. Watertown Fire Rescue was assisted by Watertown Police Department for traffic control and Watertown Utilities.