Police are investigating whether the deaths of two people found in a granny flat on Sydney’s Northern Beaches were the result of a murder-suicide.

The bodies of a man, aged in his 40s, and a woman, aged in her 50s, were discovered by police in the small flat at the rear of a home in Cannons Parade, Forestville, about 9.30pm yesterday.

Emergency services visited the home after reports of concern for the welfare of the two people – who hadn’t been seen since last Saturday – and their two dogs and cat.

Police are investigating the suspicious deaths of two people in a granny flat on this property on Sydney’s Northern Beaches. (Kate Geraghty)

Detective Superintendent John Duncan from NSW Police said today the bodies were found during a brief search after firefighters had helped police gain access to the property.

He said the man and woman, who were in a domestic relationship, were yet to be formally identified but detectives were treating the deaths as suspicious.

“At this point in time, all lines of inquiry are being looked at. I can’t tell you what the scene looks like, crime scenes are still processing it,” Duncan said.

Duncan said detectives were not at this stage seeking any third party in their investigations.

A police forensic officer at the granny flat which is a crime scene. (Kate Geraghty)

The man and woman were believed to be known to police for “minor matters”.

The couple had lived in NSW for a number of years and resided in Sydney for about 18 months.

Lacerations were found on the bodies, but there were no further details about the cause of death or the extent of their injuries.

NSW Police were in contact with counterparts in Queensland over reports the man and woman were known to police there in relation to domestic violence incidents.

“Obviously, we are talking to our counterparts in Queensland at this particular point in time; until we formally identify the people, it’s a bit difficult to actually confirm what records relate to them. So … that is definitely a line of inquiry,” said Duncan.

A ute with Queensland number plates was also seized at the scene.

Police are appealing for anyone who saw any suspicious behaviour in the street over recent days or has information to call Crime Stoppers on 1800 333 000.

Support is available from the National Sexual Assault, Domestic and Family Violence Counselling Service at 1800RESPECT (1800 737 732).

Readers seeking support can contact Lifeline on 13 11 14 or beyond blue on 1300 22 4636.

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