Australians are urged to light a candle at 5pm to honour the lives of two innocent boys killed in a horrific double murder-suicide in Mosman Park.

Leon Clune, 16, and his younger brother, Otis, 14, were found dead inside their family home by police on Friday morning alongside their parents and three pets.

The Clune family — dad Jarrod, 50, mum Maiwenna, 49, and their two sons — were discovered by police after they were called to the home by a person, believed to be a carer, who was attending the home for a pre-arranged appointment for the teens, who lived with autism.

They noticed a note stuck to the front door, warning them not to enter, but instead urging them to call police.

Homicide detectives are treating the incident as a double murder-suicide, and continue to investigate whether the children were killed before the parents took their own lives.

Australian Neurodivergent Parents Association president Sarah Langston urged Australians impacted by the children’s deaths to pay their respects by lighting a candle at 5pm (AWST) Saturday.

“We are just inviting everyone, not just the disability community, to light a candle for the boys . . . to remember them, to centre them, their lives, their dignity and their rights as children,” she said.

“It’s been very distressing, these kinds of murders are too common and whenever they happen we see a lot of commentary which overemphasises that disabled children are a burden — but they’re not a burden, they’re precious.

“Whenever is a child is killed, it’s devastating. It really touches the whole community — we all care about children.”

Ms Langston urged anyone who has the capacity to view a livestream on the association’s Facebook page at the same time, when a candle will be lit and a poem will be read in honour of the boys.

“The comments will be turned off and it will just be a chance to sit, listen and reflect together.”

A friend of the Clune family, who wished to remain anonymous, said the boys’ parents had tried to engage with support services for their children but were “consistently rejected by the very people and organisations whose job it is to support families like the Clunes”.

WA Police are investigating a note or letter that was found inside the Mott Close property, which reportedly discussed the mindset of the parents and indicated some planning behind the incident.

It is understood detectives have not drawn any conclusions on what each parent’s role was in the death of their children, before they are suspected of taking their own lives.