The cause of a fire that killed a mother and two children in Central Queensland remains a mystery as police refused to reveal if the inclusion of homicide detectives suggested foul play.

Jordana Johnson and her son Jordan Norris, along with his friend Chazz Mather, died in the early-morning blaze in Gladstone on Wednesday.

Neighbours told Nine News they heard two bangs followed by a woman screaming for help from inside the house on Whiting Street just before 6am.

The noises were so loud one of the neighbours said they thought it was an aeroplane engine.

The deaths are being treated as unexplained, though homicide detectives are currently assisting with the investigation.

Detective Acting Superintendent Luke Peachey said police are “keeping a really open mind” about the incident.

“We’

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