Detectives say they are not looking for any suspects after a woman and two young children died in a Perth car fire.

Western Australian police confirmed the bodies of a woman in her 40s, a 10-year-old girl, and an eight-year-old boy were found in a burnt out vehicle in Coogee on Monday afternoon.

They are believed to be from the same family.

Detective Inspector Quentin Flatman said while investigations were still ongoing, police did not believe another party was involved.

“Three parties have died in the rear of a car by a fire that has been started by one of those parties,” he said.

“There is no need for anyone to be concerned within the community as to any other person being at large.”

Detective Inspector Flatman said the children’s father was away on a planned trip to the US and had to be notified of the deaths.

“He’s quite shocked and is looking for answers himself,” he said.

Detective Inspector Flatman said forensic scientists were still examining the burnt out Honda Jazz, while detectives spoke to relatives and the public.

“There is no rationale as to why this has occurred,” he said.

“All of us want answers.

“Any untimely death is tragic but more so when there’s children involved.

“From this point, our role is to make sure no stone’s left unturned.”

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-AAP