A human head belonging to a 66-year-old man was found floating in the lagoon at Kattankudy 05 on Saturday evening.
Police said the victim had been reported missing two days earlier by his relatives.
Initial investigations suggest the man may have been attacked by crocodiles while bathing in the lagoon, which is known to have a high concentration of the reptiles.
The remains have been placed at the Kattankudy Hospital morgue for a postmortem examination. (Newswire)