Police are looking for two teenagers they believe may have started a fire at an abandoned building in Waterville.They say they boys were last seen leaving the Harris Bakery factory on North Street about half an hour before the fire started yesterday afternoon.Crews from three area communities responded to the fire and say they could see smoke as they approached the building. They say the fire started in a staircase leading up to the second floor, but it was quickly put out.Investigators are calling this a case of arson and say fires like these could easily turn deadly.Deputy Chief Charles Rumsey says, “The kids themselves starting the fires could become a victim of their own fires. These fires can spread to nearby homes, where people are living with children and pets. It can have the potential for massive property damage, loss of life and some people might thing who cares about an abandoned building. We care, very much. It’s extremely dangerous and it just can’t happen.”A neigbor who spotted two boys running from the building before the fire says they appeared to be between 13 and 15 years old. One of them was 5’6″ to 5’10” with dark hair. The other was shorter – between 5′ and 5’4″ with blonde hair. Anyone with information in the case is asked to call the Waterville Police Department at 680-4770.