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STORY: Outside Sao Paulo, Brazil's largest city, demonstrators blocked a major motorway with flaming tires and used bows and arrows to confront police, who dispersed them with tear gas.

Indigenous groups from across the country planned a week of protests outside Congress in the capital Brasilia.

The lower house prepared to vote on legislation allowing Indigenous reservations only on land that was occupied by native communities when Brazil passed its Constitution in 1988.

Bill 490 would not affect currently recognized reservations, but may impact hundreds of territories under evaluation.