Update 4.50pm: Police are investigating a suspected double murder after a mother and daughter were found dead by a friend in their Warwick home.
A St John Ambulance crew raced to the Felgate Place property about 2.05pm to find two women dead in separate rooms.
The mother, 67-year-old Maureen Anne Horstman, is understood to have had been found with chest injuries.
Her daughter, 26-year-old Tamara Alexander Hortsman, was found with head injuries.
Both were found deceased after Tamara failed to arrive at work and parents of one of her friends went to the address to check on her welfare.
Police last night instructed all officers to look out for Tamara's blue/ purple 2008 Mazda3 sedan, registration 1CZO135 that was missing from the home.
The car was found today parked on the corner of Teneriffe Place and Pampus Court in Mirrabooka after a member of the public called police.
Police would like to speak to anyone who saw the vehicle parked in the area in the last 24 hours, and any person sighted near the vehicle.
Insp. Dominic Wood said detectives were speaking to a man regarding the incident but could not comment whether he was a suspect or a witness.
"A man is assisting detectives with their inquiries at the moment," he said.
The driver of the vehicle is not believed to live at the house.
The police helicopter searched the area while forensic officers and major crime detectives scoured the scene.
Shocked neighbours said the mother and daughter lived in the two-storey home and the mother was often seen walking her dog around the neighbourhood.
Property records show the house is owned by Maureen Horstman and her adult children Nicholas and Tamara.
They bought the house late last year.
A neighbour said she was shocked by the incident on the usually a quiet suburban street.
She said the area was relatively safe, apart from a few burglaries, the most recent two weeks ago.
The first she heard of any incident was when emergency services arrived.
Police yesterday cordoned off the northern end of Felgate Place and the footpath that runs between the victims' home and a neighbouring house.
The footpath leads from Felgate Place south to Beach Road.
Police Insp. Dom Wood confirmed last night the deaths were being treated as suspicious.
"This is a very serious incident," he said. "It has happened in a suburban location." He did not reveal how the pair died.
A suspicious person or vehicle was reported nearby - on the corner of Beach Road and Springvale Drive - about 2.45pm but police have not revealed if it was linked to the suspected murders.
Anyone with information should contact Crime Stoppers on 1800 333 000.