A woman previously reported to have died after a fire at a Fall River assisted living residence remains in critical condition, the district attorney's office said.

All 273 assisted living facilities in Massachusetts must send letters to all residents and families detailing fire safety protocols, evacuation procedures and key points of contact, the state announced Friday.

The fire that claimed nine lives at an assisted-living facility in Fall River, Massachusetts, "was destined to kill 50-plus people," according to the local fire chief.

Investigations into what starts a fire require a methodical look at the scene and can take a long time to complete.

There’s no doubt in my mind that that fire was destined to kill 50-plus people,” Fall River Fire Chief Jeffrey Bacon said Wednesday.

FALL RIVER — The nine residents killed in a fire here at Gabriel House, an assisted living residence, are being remembered as fonts of knowledge and symbols of longevity.