A police sub-inspector was found dead in the Lower Mall area here under mysterious circumstances, police said. The deceased, 50-year-old Manzor, was appointed in Bhawana Police Station Chinute and came here for a court hearing. He stayed at the Lower Mall area where he was found unconscious. He was taken to the hospital but passed away before receiving any treatment. Police have completed the initial investigation and submitted the body to the dead house for postmortem to ascertain the cause of death.