Dhaka, May 19 -- Australian investigators have suggested that a widely publicised murder-suicide case in Western Australia influenced a triple domestic homicide in Sydney that left a woman and her two sons dead.

Police found the bodies of a 46-year-old woman and her two sons, aged 12 and 4, inside a home in Campbelltown in south-west Sydney, all three suffering fatal injuries.

A 47-year-old man, identified as the husband and father of the victims, was arrested at the scene.

Court documents cited by Australian media allege the Bangladeshi-born suspect, who migrated to Australia with his family about a decade ago, had planned the killings over several months.

Investigators are examining whether the suspect had become fixated on an earli...