From Islands in the Universe:
The Andaman and Nicobar Islands of the Indian Ocean are among the most isolated places on Earth, and their inhabitants include several aboriginal tribes that have varying degrees of interaction with the outside world. In the aftermath of the tsunami, which swept across and even reshaped the islands, there was pressing concern about the fate of these tribes.It was an odd bit of good news, therefore, when an Indian coast guard helicopter that was delivering aid in the islands recently came under attack. The attackers were of the Sentinelese tribe, the most isolated of the aboriginal groups, who used bows and arrows to ward off the helicopter. The reason this is good news is that it showed that the Sentinelese, who number only in the dozens, had survived. Moreover, they evidently were well enough to maintain their usual practice of rejecting approaches by outsiders.