dominick kaine reports. >> reporter: violent scenes in the center of frankfurt. police step in to prevent protesters taking over the streets. the block-u-py movement have called them to come on the capital, and what they see as the negative impact of austerity policies. >> above all i think the ecb is a big symbol for monetary policies in europe and it's simply very important that lots of people, from lots of different countries come together and fight against these politics. >> reporter: in some areas of frankfurt, clearly that took on a physical form. these pictures released by the police, show the violence that some file against the shorts and the role of the european central bank in the newly inaugurated building. inside the building, the president of the ecb did acknowledge the protesters' point of view, but said e.u. fiscal policy was not the cause of individual countries' economic problems. >> it has always been understood that countries have to be able to stand on their own two feet. that each is responsible for its own policies. the fact that some had to