In Rio de Janeiro, where an estimated 300,000 demonstrators swarmed into the seaside city's central area, running clashes played out between riot police and clusters of mostly young men, their T-shirts wrapped around their faces. But several peaceful protesters were caught up in the crackdown as police fired tear gas canisters into their midst and at times indiscriminately using pepper spray.Picture: EPA/OLIVER WEIKEN

Credit : EPA/OLIVER WEIKEN