Investigators said that a house fire in Claremont was likely started by smoking materials on the porch of the home.Crews responded to a fire on Sullivan Street just before 8 p.m. Sunday.The home sustained heavy smoke and water damage, but the fire was contained to the porch, officials said.A nearby home also suffered minor heat damage to vinyl windows and the painted siding.One person was home at the time, but there were no reported injuries.