A fire broke out at about 9:30 p.m. on Sunday a Fall River assisted living residence, which drew nearly 50 firefighters to the scene and left a vulnerable population calling for help from their windows.

River firefighters union says low staffing levels prevented them from rescuing more people in Massachusetts deadliest fire in 40 years.

Sunday’s fatal fire at the Gabriel House assisted living facility in Fall River killed 9, injured at least 30 and left dozens shocked and devastated in the aftermath.

Gabriel House residents described a chaotic scene Sunday night before they were rescued from the blaze that left nine dead and dozens more injured.