The cause of a fire at a Massachusetts assisted-living facility that left 10 people dead remains undetermined for now as officials investigate whether smoking materials and an issue with a medical oxygen machine may have been factors,

The cause of a deadly fire​ at the Gabriel House assisted living home in Fall River, Massachusetts has been narrowed to two possibilities.

FALL RIVER, Mass. ( WPRI) – Investigators have identified two potential causes of the deadly fire at an assisted living facility in Fall River, Massachusetts. But since they can’t pinpoint the exact origin, the cause of the fire has officially been ruled “undetermined.”