When the blaze was extinguished, firefighters found a body inside.

They aware unable to establish the identity of the person or the cause of the fire.

A crime scene was established and investigations into the blaze have commenced, with the State Crime Command’s Homicide Squad being informed of the incident.

Bells Line of Road is still closed in both directions between Mt Tomah Road at Mount St and Darling Causeway at Bell.

Motorists are being told to avoid the are and use the Great Western Highway and Darling Causeway instead.

Investigators are appealing to anyone with information to come forward or to contact Crime Stoppers.

They are also seeking anyone with dashcam footage recorded in the area between 10am-10:45am this morning to inform police.