When some workers went for the routine cleaning of the tank, they found the body inside the overhead water tank, Inspector of Police (I Town) Govindaraju told PTI.
It was yet to be ascertained whether it was a case of murder or suicide, he said.
The body, yet to be identified, had been sent for postmortem.
Meanwhile, the temple's PRO Achuta Rao said the tank is located on a hill, outside the temple premises and it did not affect the daily rituals of the temple.
All the rituals at the temple were going on as usual and the devotees were allowed to worship there, he added.
