The homicide squad is investigating the deaths of two young children found in a home in Perth’s northern suburbs.

A Perth mother remains under police guard after her two young daughters were found dead at their northern suburbs home on Friday evening.

The bodies of six-year-old Tijiana Djurasovic and her 10-year-old sister Mia were found about 6pm on Friday at their Madeley home on Bogdanich Way.

The girls’ mother, Milka Djurasovic was found more than two hours later at the Whitfords beach car park with self-inflicted injuries.

“It appears that she has self-inflicted wounds that are non-life threatening,” WA Assistant Commissioner Paul Steel told reporters. “As a result, she is not able to be interviewed at this time.”

Djurasovic was arrested and taken to hospital, where she remains in a non life-threatening condition.

Neighbour Gordana Sousak said she heard screaming about 6pm, when the children’s father came home from work, WA Today reports.

“When he called police they told him not to touch her, but by that time he’d found the other little girl in the laundry,” she said.

Ms Djurasovic was working as a nurse and the family were part of the close-knit Bosnian community in Perth, Ms Sousak said.

Commissioner Steel said homicide detectives and forensic police would work at the crime scene in coming weeks to investigate the circumstances surrounding the deaths.

“Tragically for first responders, finding the bodies of two young children would have been a terrible thing to have to go through,” he said.

“Heartbreaking events like this have an effect not only on those directly involved – the friends and family – but on the wider community of Western Australia,” he said.

“This is a tragic event and our heartfelt condolences go out to the friends and family of the children.”

Homicide detectives were conducting a thorough inquiry, with the help of forensic police, who were “meticulously working their way through the crime scene”.

Commissioner Steel said the children’s father was helping with the investigation.

Police say they have no information to indicate there is any ongoing threat to the public.

-with AAP