制限区域
In November 2018, John Allen Chau, an American missionary, traveled illegally with the help of local fishermen to the North Sentinel Island of the Andaman Islands chain group on several occasions, despite a travel ban to the island. He is reported to have been killed. A 2018 Restricted Area Permit (RAP) regime relaxed the prohibition on visiting islands in the area, but this plan was intended only to allow researchers and anthropologists, with pre-approved clearance, to visit the Sentinel islands. Chau had no such clearance and knew that his visit was illegal.