Cops battle cops at Brazil protest, six injured

Striking police investigators in Sao Paulo clashed violently with state troopers deployed to contain their protest march on Thursday. Brazilian television news showed the melee between hundreds of state police in riot gear and the plainclothes investigators after the protesters tried to break through a barrier protecting the state government palace. Officers fired shots, tear gas and shock bombs. The official Agencia Brasil news agency said at least six investigators were injured, none seriously. No deaths were reported.