SHEBOYGAN, Wis.(WHBL) - Fire of undetermined origin last night extensively damaged a southside Sheboygan home. The Fire Department said the fire was discovered shortly after 7 o'clock in the home at 3802 South 17th Street. Shift Commander Pat Nicolaus said when firefighters arrived on the scene they found flames coming out of the front windows and black smoke coming from the entire home. Nicolaus said no one was home at the time and there were no injuries. The occupants were located and contacted by the Fire Department. Nicolaus said the home sustained fire,heat and smoke damage throughout. The cause remains under investigation and, so far, there is no estimate of damage