Story highlights Police are investigating a deadly blast at a mall in a Perth suburb

Australian broadcaster reports a power transformer is believed to have exploded

(CNN) An explosion at a mall in a suburb of the Australian city of Perth has killed two people and injured three others, authorities said Tuesday.

The blast Tuesday morning at the Galleria mall in Morley sparked a fire that emergency crews put out.

The cause of the explosion is under investigation, said Western Australia Police spokesman Adam Brauwer, declining to provide details.

The Australia Broadcasting Corporation (ABC) reported that a power transformer was believed to have exploded.

The broadcaster cited witnesses who saw men in flames running out of the building.

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