The cause of the Gabriel House fire that killed 10 assisted living residentsin Fall River this month is officially “undetermined” because investigators cannot yet say whether the fatal fire was started by the electrical or mechanical failure of an oxygen machine in a resident’s room,

Rescuing residents of Gabriel House was difficult because of window AC units — often a violation of building code that's difficult to enforce.

A tenth person has died following last weekend's devastating fire at a Fall River assisted living facility, according to the Bristol County District Attorney’s office.

On Saturday, 66-year-old Brenda Cropper’s niece, Priscilla Andrade, visited the memorial for the first time since the fire. She was with her aunt hours before the flames erupted.