Remarkable new images have emerged of an uncontacted tribal community in the Brazilian Amazon which environmentalists fear could be destroyed by outside influences.

The tiny community of 100, part of the Yanomami tribe, is believed to have no contact with the outside world, but is under threat from encroaching violence and disease, and by gold-miners who have taken over the land.

Miners have brought diseases such as malaria and polluted Yanomami food and water sources with mercury, according to international NGO Survival.