UPDATE: ?The cause of Thursday's 2-alarm fire at The Arbors at Signal Mountain has been ruled as accidental, by the lead investigator for the Chattanooga Fire Department.

The investigator says the fire started on the balcony of Apartment 103. on the second floor, most likely from improperly discarded cigarette butts. 

The Chattanooga Fire Department offers these safety tips to keep your family and home safe:

  • Use large, deep ashtrays and check them frequently
  • Ashtrays should be set on something sturdy and hard to ignite, like a table
  • Completely soak cigarette butts and ashes in water before throwing them away. NEVER toss hot cigarette butts or ashes in the trash
  • Check under furniture cushions and in other places people smoke for cigarette butts that may have fallen out of sight
  • Don't smoke in bed or lying down, especially if you are drowsy, medicated or have been drinking alcohol
  • Smoking should not be allowed in a home where medical oxygen is being used
  • Keep matches and lighters up high, out of children's sight and reach
  • Having a smoker in your home increases your chances of having a fire in your home. Consider adding additional smoke alarms in your home, specifically a photoelectric type, which is the most reliable for smoldering type fires

PREVIOUS STORY: A fire at a local apartment complex Thursday forced several residents out of their homes for the night.

It happened around 5:20 p.m. at The Arbors at Signal Mountain on Runyan Drive.

Chattanooga fire spokesman Bruce Garner says the fire was found on the second floor of a three-story building.

Firefighters were able to quickly get the fire under control and extinguished the bulk of it in about 15 minutes, keeping most of the damage to three units. Two or three other units had some smoke and water damage.

All of the residents made it out safely and no one was injured.

Garner says a damage estimate is unknown at this time. The building has a total of 18 units, most of which were spared any fire damage.

Garner says with the wiring damaged by the fire, power had to be disconnected from all 18 apartment units.

Red Cross volunteers were called in to help to the victims displaced by the fire.

Garner says if EPB technicians can't restore power to the undamaged units, then the residents in all 18 apartment units will have to stay elsewhere overnight. 

The cause of the fire is under investigation.

Stay with WRCBtv.com for updates to this story.

PREVIOUS STORY: Chattanooga firefighters were called to a large apartment fire on Runyan Drive Thursday night.

The fire was reported around 5:15 p.m. from The Arbors of Signal Mountain apartment complex.

Officials say the fire is under control and no injuries have been reported.

The cause of the fire is unknown and under investigation.

Channel 3 has a crew on the scene.

Stay with WRCBtv.com for updates to this story.