POLICE say the body of a woman found in Point Cook is that of missing Bacchus Marsh woman Sarah Cafferkey.
The search for the 22-year-old is now a murder investigation.
Detective Inspector Michael Roberts, of the homicide squad, says police are still awaiting autopsy results following the discovery of human remains at a Point Cook house in Melbourne's outer west late on Saturday.
"But we certainly believe it (the body) is Sarah Cafferkey," he told 3AW morning.
"This is a murder investigation."Yes, absolutely (foul play is involved) and there is a number of inductions that we have that lead us to that belief."
Homicide detectives took over the investigation after it emerged that she had received threats from a male friend in the lead-up to her disappearance.
Friends of Ms Cafferkey said on Facebook that a male friend had posted threatening messages to her in the days before she disappeared. The messages have been shown to police and are no longer on her Facebook page.
Ms Cafferkey’s 2001 Astra sedan was found in Owen Street, Maribyrnong, on Thursday night. At the time, police said there was no evidence of foul play.
Jennifer Wojcicki posted on Ms Cafferkey’s Facebook page on Saturday: “I’ve lost [hours] of sleep over the week. I’ve been so stressed and scared, my brain is in over drive thinking, I’ve cried so many tears, I’ve watched and read more news segments than ever before in my life, and I’ve never felt more helpless, all this because I care and love you.
“The girl I’ve known since the day I was born. The girl I know with the gorgeous smile and the bubbly infectious personality. Please be ok safe and well and home with your family and friends soon.”
Catt Angwin posted to Ms Cafferkey on Friday: “I cant stop thinking about your gorjus [sic] smile that always lights the room up .. I just wanna hear you safe and okay! love you sarBear. “