BERLIN - German police say some 10,000 activists are participating in a major rally of the local Occupy movement in Frankfurt.
Police spokesman Ruediger Regis said Saturday more protesters are still flowing into the city centre of continental Europe's biggest financial hub.
Organizers have said they expect some 20,000 protesters.
The protest group calling itself Blockupy denounces the power of the banks and what they perceive to be untamed capitalism. It has called for barring access to the European Central Bank, which is located in Frankfurt's downtown business district.
Police on Friday temporarily detained some 400 demonstrators during unauthorized Blockupy protests by thousands of activists after they erected barricades and staged sit-ins.
Some 5,000 police officers are assigned to keep the weekend protests in check.