Investigators say a fatal fire at a Maine lumber mill was accidental and began at the base of a silo. Authorities report that the blaze led to a subsequent explosion at the facility. The fire kills one firefighter and injures about a dozen other people, according to the accounts from both outlets. Investigators characterize the incident as not intentional and describe the origin point as located where the silo meets the ground. The reporting indicates that the determination is based on the ongoing investigation’s preliminary findings or official statements released to the public. While details about the specific cause of ignition were not provided in the excerpts, both sources consistently describe the same sequence: a fire starts at the silo base, it escalates, and an explosion follows, resulting in casualties among emergency responders and others at the scene. Authorities continue working to understand the circumstances that led to the initial ignition.