The man, whose identity is yet to be established, had entered the enclosure of Raghav, the full grown tiger, last night and was found unconscious inside the cage by zoo staff this morning.
The victim was removed from the cage by the zoo staff and admitted to the government-run MGM Hospital here after administering first-aid, sources in the zoo said.
They suspected that the man entered the tiger enclosure with the intention of poisoning the striped cat to get its skin, or steal cubs from adjoining enclosures.
The matter would be probed in detail, the sources said.
Police said they were investigating how the man managed to evade security and entered the enclosure.
It also needs to be ascertained whether the man is in a mentally sound state, police said.
