"The fundamental picture is taking a back seat because everyone is worried about Europe, " said Marcio Bernardo, an analyst at brokerage Newedge.

WSJ: Trouble Brews in Colombia

Tanzania's Brazilian coach Marcio Maximo said he was happy with the win, adding that his side grabbed victory after taking heed of his half-time team talk.

BBC: Cecafa wins for Tanzania, Rwanda

Germany's Borussia Dortmund remain in second, three points behind the Gunners after goals from Jan Koller, Tomas Rosicky and Marcio Amoroso saw them win 3-1 at PSV Eindhoven .

BBC: Zidane rescues Real

"It is impossible to deny that there is a line that connects the deaths of civilians and policemen, " said Marcio Christino, a public prosecutor working in criminal justice in Sao Paulo, who specialises in the PCC.

BBC: Sao Paulo police at war with prison gang