The “most detailed sightings of uncontacted tribes ever recorded on camera” have been released to illustrate the danger of their lives becoming less isolated.

Peruvian authorities are struggling to keep outsiders away from a clan of previously isolated Amazon Indians who began appearing on the banks of a jungle river popular with environmental tourists last year.

Tens of thousands of union members took to the streets across Peru to protest against rising food and fuel prices they blame on the free market policies of President Alan Garcia.