BENGALURU: A 17-year-old II PUC student was found dead under mysterious circumstances inside the toilet of his hostel in Bellandur, south-east Bengaluru, on Saturday evening. Sarthak Puranik from Dharwad was a student of Sri Chaithanya PU College. He went to the toilet around 7.30pm. Nearly half an hour later, his friends noticed that he had not returned. The boys rushed to the toilet and found Sarthak unconscious. They alerted officials in charge of the hostel and took him to a nearby hospital where doctors declared him brought dead. The doctors said he might have died at least an hour before he was brought to the hospital. According to police, The reason for death is unclear. The autopsy report is awaited After the postmortem examination at St John's Hospital, Madiwala, on Sunday , the body was handed over to his parents-- Mr.Srikant Puranik and Mrs.Suchendra Puranik who are hoteliers . He had joined the college two years ago and was residing in the college hostel. "It doesn't look like a case of suicide. The viscera samples from his body have been sent to FSL for examination. His parents haven't raised allegations of any kind against the college or any others," an officer said. A case of unnatural death has been registered.