The parents of an Irish girl who was found dead in Malaysia last year have asked authorities in Kuala Lumpur to conduct an inquest into the death, their lawyer said on Tuesday.

Nora Anne Quoirin, 15, who suffered from learning difficulties, went missing in early August from a rainforest resort in Seremban, about 70 kilometers south of the Malaysian capital, a day after her family arrived on holiday.

Her naked body was found 10 days later near a jungle stream in a deep ravine near the Dusun resort, where the family was staying.

Lawyer Sankara N. Nair, who is representing the family, said he has written to Malaysia's attorney general asking for an inquest on the parents' behalf and is yet to hear back from the country's top prosecutor.

"They feel that the investigation carried out by the police is not thorough," Nair told reporters at a court complex in Seremban.

Nair said the family has filed a civil negligence lawsuit against the resort operator claiming 152,000 ringgit ($37,375), saying the resort was unsafe.

Malaysian police last year ruled out abduction as a motive, saying they had found no signs pointing to foul play.

Officials have said an autopsy established that Quoirin had died from internal bleeding, which is probably caused by prolonged hunger and stress. She had suffered intestinal damage, and died two or three days before her body was found, they said.