The fire killed nine people and trapped residents inside, including some who leaned out of windows and screamed for help.

Local and state fire investigators are working to identify the origin and cause of the 5-alarm at Gabriel House on Oliver Street, officials said.

Calls to 911 reporting a fire at an assisted-living facility in Fall River, Massachusetts, began coming in shortly after 9:30 p.m. Sunday, marking the start of a prolonged emergency response to rescue the roughly 70 people who lived there,