Huge iron ore deposits and valuable timber have encouraged mining and logging companies to enter the forests of Maranhão despite laws designed to protect the few remaining uncontacted tribes, often leading to violent clashes.
Around 450 tribes people have were murdered in Brazil between 2003 and 2010, according to figures from CIMI.
Survival, a charity for tribal groups, warned that a third of the Awá's land had already been destroyed and that their nomadic hunter-gatherer lifestyle was being threatened as animals fled in the face of the approaching logging companies.