CARL RUSSO PHOTOS: Fire Chief William Laliberty said although investigators interviewed several people who witnessed Tuesday night's fire at an old Victorian home that displaced four families, no one was able to say exactly how the fire started.

"The cause will be left as undetermined and although we know it started in the shed behind the building, we can't confirm what started it," he said. "It could have been a discarded cigarette or something else, but we cannot define the actual cause and there is nothing that leads us to say whether it was deliberately set or not."

He said damage to the building was so extensive that tenants are not being allowed back inside to retrieve any of their belongings. In fact, the house was so severely damaged that the owner has agreed to have it torn down, he said, indicating demolition is expected to take place in a day or two. In the meantime, firefighters are stationed at the building to ensure no one enters it.