(POCATELLO, ID) – The Pocatello Fire Department is investigating a possible chemical leak at a business in Old Town. Crews responded to the scene after getting a call from an Intermountain Gas inspector. The substance was isolated at a building on the 500 block of North Main inside the Muse clothing store. Traffic in front of the building was blocked for over five hours Friday night. Authorities say the substance is very flammable and smells like sewage.