Violent scenes in Rio de Janeiro.<br/> <br />Riot police use tear gas and pepper spray to disperse about 150 protesters.<br/> <br />Several people were injured in the scuffles.<br/> <br />The clashes came as the Brazilian city prepared to host its first game of the World Cup tournament.<br/> <br />Police blocked the protesters from reaching the Maracana stadium before the football match, Argentina against Bosnia.<br/> <br />Brazilians are angry at how much the government has spent on preparations for the World Cup and the Olympics, which Rio will host in 2016.<br/> <br />A similar sized march was also held ahead of the Switzerland-Ecuador game in Brasilia.<br/> <br />These demonstrations in the Brazilian capital were peaceful. Protesters here simply laid down their banners and dispersed when the game started.<br/> <br />But anti-world cup protests have tapered off since Thursday, when police used stun grenades and tear gas against up to 600 protesters.<br/> <br />And the tournament has been much smoother than many expected, with
