‘Any exploitation of Sentinel Island will wipe out tribals’ Updated: Updated: Anthropological Survey of India policy document warns of threat to endangered group from commercial activity Share Article Anthropological Survey of India policy document warns of threat to endangered group from commercial activity Any exploitation of the North Sentinel Island of the Andamans for commercial and strategic gain would spell the death knell for its occupants, the Sentinelese, a most secluded, particularly vulnerable tribal group (PVTG) who reside in complete isolation on the island, the Anthropological Survey of India (AnSI) has said. In a policy document, which comes almost two years after American national John Allen Chau was allegedly killed by the Sentinelese on the Island, the AnSI says the “right of the people to the island is non-negotiable”.