Charleston firefighters and city police are investigating an apparent arson at a West Side home that was set on fire two days in a row.Sgt. Eric Hodges of the Charleston Police Department said someone apparently set fire to the home at 947 Walnut St. at about 1 a.m. Sunday and again at about 2 a.m. Monday.Capt. Ken Tyree of the Charleston Fire Department said the house was destroyed by the fires. He said the house had been rented, but had been vacant since July. He said the previous tenant's belongings were still in the house, and the landlord was making repairs to the structure at the time of the fires.Tyree said people had apparently been staying in the house without permission. The house had no electrical service and was not insured.Tyree has heard that some type of dispute was behind the burning of the house, but has found no evidence to support the theory. "Anything is possible at this point," he said.Anyone with information is asked to call the Charleston Fire Department at 304-348-8058.