Reports of gunshots as human remains found in two burnt-out cars in Sydney overnight

Police set up a crime scene after bodies were found in two burnt-out cars, one at Waterfall in the Royal national park and another at North Parramatta in Sydney. Photograph: Dean Lewins/AAP

Human remains have been found in two burnt-out cars in two different parts of Sydney, but police said it was too early to tell whether the two discoveries were linked.

Skeletal remains were found inside a burnt-out four-wheel drive in a national park south of Sydney early on Tuesday morning.