An apartment linked to Brisbane’s “bag of bones” murder mystery has been destroyed by fire, which residents believe was deliberately set alight.

Nobody was inside the Kangaroo Point housing commission flat as the inferno tore through the building Friday night, but 35 residents of the building were evacuated.

“A three-metre high wall of flames shooting out of the unit next door,” resident Deborah Boutland told 7 News.

“It sounded like gas cylinders exploding. It was extremely frightening.”

View photos Residents believe the fire may have been deliberately lit. Source: 7 News More

The fire was contained to the single apartment, but smoke severely damaged the one above. Many residents said they did not even realise there was a fire in the building as sirens and police visits are such a common occurrence there.

“We have had problems with people coming around threatening people in this unit. The last words that were said were ‘We will be back’,” Ms Boutland said.

Police and firefighters are investigating the cause, but residents believe it was deliberately lit.

View photos The Kangaroo Point apartment is linked to Brisbane’s bag of bones mystery. Source: 7 News More

Fire link to Constance Watcho ‘bag of bones’ murder

In September, police spent more than one week sifting through the same flat after the occupant found a bag of bones at the base of Kangaroo Point cliffs, belonging to Constance Watcho.

The occupant is believed to be the same man who reported the woman missing in March.

View photos The bag of bones discovered at Kangaroo Point belong to Constance Watcho. Source: 7 News More

“She was a very nice girl,” resident Kristy Hill said of Ms Watcho.

“She used to come here in the oval in the middle of the complex and play footy.”

No one has been charged in relation to Ms Watcho’s death.