AdvertisementA 16-year-old boy is believed to be among the three people killed in a fire that tore through a granny flat in Sydney’s south-west on Wednesday night. AdvertisementFootage captured on Wednesday night shows the granny flat engulfed in flames, which rose from the property as the fire closed in on the footpath. It is devastating for the family of those people who have been lost last night,” Fewtrell said. The granny flat sits at the far end of the property, adjacent to an apartment building. A police officer watches on as detectives sweep through the Wiley Park granny flat on Thursday.