New theory emerges about Blue Mountains alleged double murder after two boys found dead in Faulconbridge home - as their mum Trish Smith is kept under police guard in hospital

Police will investigate whether a mother suffered a psychotic episode after her two sons were found dead in an alleged double murder.

Russell and Ben Smith, aged nine and 11, were found in a home on Chapman Parade in Faulconbridge just before 12.40pm on Tuesday suffering reported stab wounds. 

Their 42-year-old mum Trish Smith was airlifted to Westmead Hospital in a stable condition after an ambulance helicopter landed at nearby Springwood High School. She was treated for cuts to her wrists under police guard.

Police are now investigating whether Ms Smith suffered a psychotic episode, The Australian reported. 

Officers were called to an address on Chapman Parade today regarding the concern for welfare of a woman and two children, police commissioner Karen Webb said on Tuesday afternoon.

Police attended a short time later and discovered the bodies of two children - two boys, one aged nine and one aged 11.

A female has been transported to hospital. She is under police guard in hospital and she has been arrested.

Police are not looking for any other persons, and a thorough investigation by Strikeforce Stafford has commenced.

The two young boys bodies and their injured mother were found by their father, who was not living at the home. 

Police are investigating whether Trish Smith (pictured with Russell and Ben) suffered a psychotic episode

The family are pictured during happier times. Father Nick Smith is on the right

 

A major police response was triggered in Faulconbridge after the bodies of two young boys were found in a home on Chapman Parade

The boys mother has been rushed to Westmead Hospital in Sydney with knife injuries

Police are not believed to have had any previous interactions with the family. 

Photos posted on social media showed the family beaming with joy as they posed for pictures with Santa, enjoyed family holidays, and explored the wilderness around the Blue Mountains.

Just eight months ago, Google Streetview images captured the childrens Christmas decorations strung up across the front yard of the familys home. 

Retired homicide detective Steve Ticehurst, who lives around the corner from the family, said they had been well-liked members of the close-knit community.

They seemed like a really happy family, they have been living here for years, and you would just never pick something like this would happen, he told Daily Mail Australia.

They would all come together to the local street Christmas party and appeared every bit the perfect family.

The mum used to be known for taking exercise walks around the area in the afternoons and we would always have a chat.

There was never any indication anything was wrong. I couldnt say a bad word about them.

The boys father (pictured with his family) found the bodies of his sons and his former partner

The mothers mental health will form part of the police investigation

Another neighbour, who did not want to be named, said the entire community was rocked by the incident.

You used to see her walking her dogs around the streets all the time, and out and about with her sons,’ the local resident said.

They were lovely young boys.

You’d never think something like that could happen here - it’s a quiet community.

The childrens father Nick Smith, who is separated from their mother and did not live at the same address, called triple-0 when he visited the home and found the boys bodies and his former partner injured, the Sydney Morning Herald reported.

NSW Police established a crime scene at the Blue Mountains home and are investigating the circumstances of the deaths. 

The scene of the incident is just 450m from the Blue Mountains famed Norman Lindsay Gallery.

Residents ferrying children from the local Springwood High and Public Schools were banked up were banked up in both directions as police slowly waved traffic past the home.

Mr Smiths Mercedes Benz station wagon on Tuesday night remained outside the familys property - a modest weatherboard bungalow at odds with many of the street’s new homes.

Residents said they had not seen Mr Smith around in a while but that he had once joined the children and their mother at local events.

Shocked neighbours described the woman and her sons (pictured) as a really happy family

The boys aged nine and 11 (both pictured) were found dead inside the home on Tuesday

NSW Police said officers from Blue Mountains Police Area Command are investigating the circumstances of the deaths and are being assisted by detectives from State Crime Commands Homicide Squad 

Neighbour Barbara Faith said she would regularly see the two brothers riding on their bikes back from school.

They had their helmets on, and they were doing the right thing ... I just thought they were lovely kids, Ms Faith told the ABC.

She said there was a huge commotion shortly after midday with about 20 emergency vehicles rushing down her street. 

Its such a quiet neighbourhood and quiet street you dont expect those sorts of things, she said.

Its just so sad, I cant believe this could happen anywhere let alone my street.

For free mental health support call Lifeline Australia: 13 11 14