An electric bicycle was believed to have started a fire in a tower, investigators said.
A man is believed to have died after climbing out of a window to escape the blaze in the Easton area of Bristol on Sunday.
Emergency services were called to the fire on the top floor of Twinnell House on Wills Drive near Stapleton Road shortly after 2.15am.
Eight people were treated in hospital and one continues to receive treatment for minor burns.
Around 90 residents were evacuated and a rest center was set up at St Nicholas Of Tolentino RC Church in Lawfords Gate.
Bristol City Council housing officers continue to provide support to those affected.
Wills Drive has now reopened, the tower has been declared safe and the cordon lifted.
The investigation of the fires revealed that smoke detectors were provided in the property and electricity was hardwired by the owners
Avon Fire and Rescue regional manager Steve Quinton, who led the investigation into the fire, said fire prevention measures, including exterior cladding, worked and contained the fire in the fire. apartment where he started.
“Fire investigators have identified the cause of the fire as accidental due to an electric bicycle,” he said.
“Investigation of the fires revealed that smoke detectors were provided in the property and electricity was hardwired by the owners.
“Having seen the tragic fire, it is understandable that residents are concerned about the risk of fire in their own homes, whether they live in apartments in town or elsewhere.
“If you’re concerned about fire safety in your home, one of the most important things to do is make sure your escape routes are clear and everyone living on the property knows how to get out in the event of a fire.” ’emergency. ”
Councilor Tom Renhard, Bristol City Council Cabinet Member for Housing Delivery and Homes, added: ‘We would like to extend our condolences to the family and friends of the person who sadly lost his life on Sunday.
“Many people will be affected by this tragedy, and I encourage residents to seek help from the council’s housing team who will continue to monitor everyone.”