Both the Janesville Police and Fire Departments are investigating an early Tuesday morning Blaze in the Jacob Woodland Heights Mobile Home Park. Fire Shift Commander Jim Ponkauskas says firefighters found the mobile home at 1548 Swallow Lane completely engulfed in flames when they arrived about 4:30. Ponkauskas says a single mother and her two children were not at home at the time, but a dog and cat perished. He adds the owner reported to a Rock County Communication dispatcher someone may have set the fire. The home is a total loss.