Police, fire, and EMS crews worked to rescue residents as smoke and flames spread through Gabriel House Assisted Living Facility in the heart of the city.

The scene outside Gabriel House, the assisted living facility that saw a deadly fire over the weekend, was solemn Wednesday, as mourners placed flowers and lit candles, some praying, others standing silently, some imagining the scene over the weekend that left nine residents dead.

Investigators are looking into a number of issues including the possibility that the fire was caused by smoking near an oxygen tank.

First responders rescued dozens of people from inside an assisted living facility where nine people were killed.

River are delivering an update on the deadly fire that killed 9 and injured 30 there Sunday night. Watch live:

A blaze at a Massachusetts assisted-living home Sunday killed a musician, a secretary, a veteran Army sharpshooter and six other people. Some in her family say Gabriel House wasn’t