A USA tourist is believed to have been killed by an isolated Indian island tribe known to fire at outsiders with bows and arrows, Indian police said.
Once they reached Port Blair, the fishermen narrated the incident to a local preacher, Alex, who was a friend of Mr Chau. They added that when they started sailing away from the island, they saw the tourist's body half buries in sand.
In a 2015 interview with The Outbound Collective, an online community of adventure travellers, Chau was asked what was on the top of "his must-do adventure list right now".
"Going back to the Andaman and Nicobar Islands in India is on the top - there's so much to see and do there!"
Website Andaman Sheekha, quoting sources, reported that the victim visited Andaman and Nicobar Islands five times in past and had a strong desire to meet Sentinelese tribes for preaching Christianity.
The police personnel are using helicopters to search for the body but have not been able to land because of the protected tribe's alleged hostility.
The U.S. Consulate in Chennai, in the capital of Tamil Nadu state, said it was aware of reports of the American but declined to comment.
While a few attempts to contact and interact with the tribe were made between the 1960s and the 1980s, things haven't really worked out as the members are known to attack any one who they think is intruding into their island. "The government has to protect them".
In the early 1990s, the Sentinelese people are known to have permitted vessels to come close to the island, sometimes even greeting the people.
Poachers are known to illegally fish in the waters surrounding the island for turtles, lobster and sea cucumbers.
In 2006, two Indian fishermen were killed by local tribespeople when their boat broke loose and drifted to shore.