German police report that 197 officers have been injured during the mass protests so far, including one on Friday that the Hamburg police reported had broken his leg. Eighty-three protesters have been detained so far and 19 arrested.
While most of the 100,000 estimated demonstrators have remained peaceful, police responded with water cannons and tear gas yesterday after being pelted with glass bottles. Barricades have been erected in some streets, some cars have been set on fire and today people broke in to a closed metro station. The police reported the first use of a firearm on Friday evening, when a police officer fired a warning shot while breaking up an assault.
Greenpeace also sent nearly two dozen divers to attempt to reach a concert hall where world leaders were to be entertained following the first official day of the summit.
The 15,000 police already on hand to provide security for the summit are apparently to be supplemented with another 1,000 reinforcements from around Germany. The Hamburg Police official Twitter account reports hearing chants of "All Hamburg hates the police!" from demonstrators.