As the July 7-8 summit started on Friday, Black Bloc anarchists and other anti-capitalist protesters sat in groups on main intersections, blocking streets and bridges leading to the summit venue as well as a road used by trucks at Hamburg Port.
On Thursday night, they hurled beer bottles, blocked roads using trash bins and set cars on fire.
A Black Bloc activist who gave her name as Noura blamed police intransigence for the violence.
“The police represent a government that says it is open and tolerant,” said the 27-year-old, who came from the western town of Krefeld and was trying to talk male friends out of hurling beer bottles at riot police.
