RIO DE JANEIRO, Brazil — Police detained more than 50 people in Rio de Janeiro after a crowd of slum-dwellers blocked a road to protest alleged police abuses. Residents of the northern Rio slum of Morro do Borel raised barricades and staged a violent protest on a busy road in the nearby middle-class district of Tijuca late Saturday, burning two cars, said a local policeman, who asked not to be identified.
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