Toxic gas theory appears unlikely cause of death

One theory over what caused the deaths of four people in a Broadmeadows house has been discounted thanks to a pet pooch.

Carbon monoxide poisoning is not believed to have been the cause of a tragic quadruple fatality at Broadmeadows.

The bodies of Abdul El Sayed, 17, two men aged 37 and 32, and a woman, 42, were found in the living room of the Bicknell Court property in the early hours of Tuesday.

The Herald Sun understands a dog which had been in the house was alive when a relative made the horrific discovery, indicating the house was not filled with toxic gas.

Abdul’s uncle Corey Lewis, who broke into the property and found the bodies, was not overcome when he went inside.

A dog was at the house alive when a relative discovered the four bodies. Picture: Andrew Henshaw

Abdul El Sayed, 17, died inside the Broadmeadows home on Tuesday.

The possibility of a faulty heater emitting carbon monoxide was one of the initial considerations for investigators.

It could be some time before a conclusive cause of death is known.

The possibility the four died from drug overdoses remains under investigation.

The four were found in the living room of the Bicknell Court property at 2am.

Police will prepare a report for the Coroner.