"Indigenous activists threatened a clash with Brazil's government as they dispatched boats carrying 150 men on Wednesday to occupy the planned site of a controversial hydro-electric dam in the Amazon, a chief said.
Environmentalists, indigenous groups and local residents lost a protracted court battle to halt the bidding process for the giant Belo Monte dam, projected to be the world's third-largest.
Brazil awarded the tender on Tuesday to Norte Energia, a consortium led by a subsidiary of state electricity company Electrobras, which will hold a 49.98 per cent stake in the project.
"Boats are in the process of leaving and we hope to occupy the territory tomorrow (Thursday). We will build a permanent village there and will not leave so long as the project is on," chief Luiz Xipaya told AFP."