The deadly fire at an assisted-living facility in Fall River, Massachusetts, was accidental, however, the cause is classified as undetermined because investigators found two possible origins, officials said.
State Fire Marshal Jon Davine there are two possible causes that “were clearly accidental”: an electrical or mechanical failure involving an oxygen concentrator, or improper use or disposal of smoking materials.
Officials will continue to investigate, but may not be able to narrow it down to one cause, Davine said…