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.

More than 75 percent of Gabriel House residents are enrolled in Medicaid, state officials have said, and it charges significantly less than a typical assisted living facility does for private-paying patients.

Ten people have died and 30 others were treated at hospitals after a fire on July 13 at the Gabriel House assisted living facility. The cause is under investigation.

The Bristol County District Attorney’s Office said it erroneously reported 66-year-old Brenda Cropper dead due to a “miscommunication.” The post Fall River fire victim reported dead Thursday is still alive,