Thousands of Occupy Wall Street protesters have held demonstrations in the United States and other cities around the world as part of a day of action marking the two-month anniversary of the start of the movement in a Manhattan park.

In New York Thursday, thousands of protesters marched across the Brooklyn Bridge, hours after anti-capitalist demonstrators pushed back against police and dismantled barriers that officers had erected around Wall Street. At least 200 people were arrested during the confrontations.

The mass protest took place two days after the city evicted protesters from lower Manhattan's Zuccotti Park, which has been the epicenter of the movement. They were allowed to return to the public space, but prohibited from camping there. The protesters also took their demonstrations to New York's subways.

Elsewhere, police in Los Angeles, California arrested at least 20 anti-Wall Street protesters while clearing a mini-camp in the downtown area. Similar demonstrations took place in Portland, Oregon and other U.S. cities. Demonstrators in Washington, DC marched on the sidewalk of the Key Bridge connecting Washington and Virginia as part of a nationwide “Get on the Bridge” call to action.

Overseas, anti-capitalist demonstrators camped outside St. Paul's Cathedral in London refused to leave despite the expiration of a Thursday deadline for them to take down their tents or face legal action.

In the U.S., tension between demonstrators and local authorities has escalated as police clear protester encampments. The clearing of the Occupy camp in New York follows similar evictions in Portland, Atlanta as well as Oakland .