The five people found dead at a rural Oregon property have been identified as the suspected killer’s girlfriend, three generations of her family and two friends, authorities said Monday.

Investigators are treating the deaths as a quintuple homicide after the bodies were discovered Saturday at a property near Forest Grove, about 30 miles west of Portland.

The suspected killer, 36-year-old Benjamin Charles Parker, was found dead Sunday inside his car in Enumclaw, Washington, about 187 miles from the crime scene. Authorities believe Parker killed himself and said there is no continuing threat to the public.

The Washington County Sheriff’s Office identified the victims as Parker’s girlfriend, 26-year-old Stella Jade Kimsey; her mother, Rowan Karla Kimsey, 60; and her grandmother, Mary Elizabeth Kimsey, 85.

Stella Kimsey’s best friend, Linsey Mae Haraldsen, 26, and Haraldsen’s partner, Alvin Raymond Chu, 27, were also killed.

Authorities said Rowan Kimsey owned the rural property and lived there with her daughter and Parker.

Two dogs and two cats were also found dead at the scene. Another cat was taken to a veterinarian but was later euthanized because of the severity of its injuries.

Authorities have not disclosed how the five victims or the animals died.

The investigation began early Saturday when emergency crews responded to reports of a vehicle fire at the property. They subsequently discovered the five bodies and several animals, triggering a sprawling homicide investigation.

Investigators announced Sunday that they were searching for Parker before he was found dead in Washington state.

Authorities have not said what evidence led them to identify Parker as the suspect or disclosed a possible motive for the killings.

Sheriff Caprice Massey described the crime scene as extraordinary in its scale and complexity.

“I will say that in my 22 years here, I have not been a part of or witnessed a scene quite this complex involving this type of an investigation,” Massey said.

Officials faced questions over why the discovery of the bodies was not publicly announced until Sunday. Detective Shannon Wilde said investigators had been working to identify the victims, notify their families and pursue an active investigation before releasing details.

“Any time you have one person deceased, let alone five, that’s a logistical challenge,” Wilde said.

The sheriff’s office is continuing to investigate the deaths and has asked anyone with information about the case to contact authorities.