An American tourist trying to visit a lush, remote island in India has been killed by a tribe completely cut off from the outside world and known to attack outsiders with bows and arrows, police revealed Wednesday.

Indian officials have identified the victim as John Allen Chau, 27. They added that he was illegally ferried by fishermen to North Sentinel Island last week, part of the Andaman and Nicobar Islands, a group of islands in the Bay of Bengal between India and Burma.

“Adventure awaits. So do leeches,” read the final post on his Instagram account, dated Nov. 2. On his Facebook profile, Chau described himself as a “soccer coach, traveller, and writer.” He often posted images of his worldwide exploits online, such as hikes in Washington state and prior trips to India.