A Class VI student of a government-aided higher secondary school at M.M. Kovulur was found dead in a septic tank under mysterious circumstances here on Wednesday.

The deceased was identified as K. Hariprasad (11) of Palani. Police recovered the highly-decomposed body and sent it to the Dindigul Government Hospital for post-mortem.

As foul smell started emanating from the toilet, a teacher in the school asked the students to check it up. They told the teacher that the smell was from the septic tank. When the cleaning staff checked the septic tank, they found the body.

After preliminary investigation, the police said the deceased was staying in the school hostel. He came to the hostel from Palani on October 6. Four students, including the deceased, reportedly went out of hostel the following day, and only three returned to the hostel. Further investigation is on.