The co-owner of a lumber mill in Maine dies from injuries sustained in a fire and explosion at the facility, according to statements shared by the Robbins family and Maine Governor Janet Mills. The death follows the incident that is described by officials as a mass casualty event. With the co-owner’s death, the reported fatality count rises to three people. The sources also state that two of the three deaths are firefighters, indicating that emergency responders were among those injured in the blast and subsequent fire. The articles characterize the co-owner’s death as occurring after he was hospitalized with injuries related to the incident, rather than at the scene. Authorities and officials continue to treat the event as a serious industrial accident, and they are working to determine the circumstances surrounding the explosion and fire. Further details about the mill, the sequence of events, and any investigations into the cause are not provided in the excerpts.