A man who grew up in Vancouver is believed to have been killed by an isolated Indian Ocean island tribe known to fire at outsiders with bows and arrows, Indian police said Wednesday.

The man has been identified as John Allen Chau, 26.

Police officer Vijay Singh said seven fishermen have been arrested for facilitating Chau’s visit to North Sentinel Island, where the killing apparently occurred. Visits to the island are heavily restricted by the government.

The Sentinelese people live on the small forested island and are known to resist all contact with outsiders, often attacking anyone who comes near.

A news brief published in The Columbian in 2009 says Chau, a Salmon Creek resident, attended Vancouver Christian High School.