Malaysian police said on Thursday that Irish-French teenager Nora Quoirin died from internal bleeding likely caused by hunger and stress.
They added that the autopsy had not found evidence of sexual assault or that she had been the victim of a kidnapping.
Nora Quoirin, 15, suffered from learning disabilities. Her unclothed body was discovered on Tuesday near a stream some 2.5 km away from the Dusun resort in Seremban where she had been staying with her family for a holiday.
The nine-day search for the missing teenager involved more than 350 officers with authorities from Ireland, France and Britain — the Quoirin family resides in London — also providing assistance.
France announced on Wednesday that it had opened a criminal probe for kidnapping. The country, from where Nora Quoirin’s father comes, often launches investigations involving French citizens abroad.