Police are investigating after the discovery of two bodies at a home in Sydney's south-west this morning.
Officers were called to the house on Queen Street in Revesby shortly before 10am (AEDT).
They found the bodies of 63-year-old woman and her 69-year-old husband inside.
A crime scene has been set up and forensic officers are examining the house.
Police say they are treating the deaths as suspicious, but it is still unclear exactly how the pair died.
Inspector Scott McAlpine says homicide detectives are trying to determine whether an intruder was responsible.
"The house is a neat family home. At this stage, we can't determine whether it's been robbed or not," he said.
"What I will say is, Bankstown detectives are leading the investigation and all those avenues will be looked at.
He says the couple's daughter found the bodies and is understandably distressed, while other family members have been notified and will be interviewed.
"The daughter regularly attends the family home. [She's] very upset at this stage," Inspector McAlpine said.
"All parties are assisting police at this stage. For all those involved, it's a shocking investigation."
"They've lived here for a number of years and there's been no previous history of disputes or anything like that at this location," he said.
A neighbour, Demi Camelin, says she is shocked to hear of the couple's death.
"Even when we were fixing the house and moved in here he was always there and to have a chat, so never ever had an issue with them."