A fire this week that killed nine residents at a Fall River assisted living home has raised new questions about whether the 273 such residences in Mass. are properly staffed and equipped.

Flames roared through an assisted-living residence in Massachusetts, killing nine people, injuring 30 others and trapping residents inside. Firefighters responded Sunday night to the Gabriel

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.

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.