Protestors march on Wall Street

Cordons set up around the NYSE

Hundreds of Occupy Wall Street protesters clogged the streets of lower Manhattan Thursday morning, while thousands of union members and OWS protesters marched across the Brooklyn Bridge in the evening to protest joblessness and economic injustice.

The Service Employees Intl. Union and progressive groups staged similar bridge marches in several cities in an event that was planned weeks ago but happened to coincide with rallies marking two months since the start of the Occupy movement.

OWS protesters marched toward Wall Street Thursday morning, blocking entrances of the New York Stock Exchange and hoping, but not succeeding, in disrupting the ringing of the opening bell. Police made at least 100 arrests.

Meanwhile, a human rights organization on Thursday criticized the arrest and assault of journalists during OWS protests in New York and other U.S. cities in recent weeks. The Washington-based Office of the Special Rapporteur for Freedom of Expression of the Inter-American Commission on Human Rights called for authorities to guarantee and protect the practice of journalism at public demonstrations.

(Associated Press contributed to this report.)