An 11-month-old baby girl who was tragically found dead inside the grounds of a private school was accidentally left inside a car by her mother, police believe.
Detectives think the mother was in the process of dropping off or collecting another child at an after-hours childcare facility when the tragic accident unfolded.
The school, Kingsway Christian College in Darth, Perth, is yet to publicly comment on the disturbing discovery made on Wednesday afternoon.
An 11-month-old baby was tragically found dead on the grounds of Kingsway Christian College in Darth, Perth on Wednesday (pictured)
How long the baby was allegedly left unattended in the car is not known, The West Australian reported.
The school is well-known in Western Australia, with tuition costing upwards of $10,000 per year.
On Thursday morning, West Australian Police said a person was assisting them with the investigation but they offered no further detail about the person in question.
Three crews from St John Ambulance Service attended at the campus just after 5.40pm on Wednesday after the baby's body was found.
Who called authorities was not publicly revealed.
Forensics officers were also on the scene and appeared to focus on one classroom in particular.
They also paid close attention to a white van which was on the campus and eventually towed away by police about midnight.
Officers continued to search the area using torch light late into Wednesday evening.
The school, 17km north of Perth's CBD, is a co-educational school with pupils from kindergarten to Year 12.
Major Crime squad detectives were at the scene late on Wednesday and were focusing on a portable classroom and a white van (stock image)
The school is closed due to the Easter school holidays, but an after-hours daycare was open earlier on Wednesday.
Children were coming and going for much of the day before the body was found.
The centre reopened on Thursday, with the college confirming holiday care and daycare activities were running as usual.
Western Australian Police told Daily Mail Australia investigations are ongoing.