The march started about 3:30 p.m. from the protesters' camp in Zuccotti Park in downtown Manhattan near the former World Trade Center. Members of the group have vowed to stay at the park through the winter.

CELEBRITY SUPPORT

In addition to what they view as excessive force and unfair treatment of minorities, including Muslims, the movement is also protesting against home foreclosures, high unemployment and the 2008 bailouts.

Filmmaker Michael Moore and actress Susan Sarandon have stopped by the protesters' camp, which is plastered with posters with anti-Wall Street slogans and has a kitchen and library, to offer their support.

Friday evening, more than 1,000 demonstrators, including representatives of labor organizations, held a peaceful march to police headquarters a few blocks north of City Hall to protest what they said was a heavy-handed police response the previous week. No arrests were reported.

A week ago, police arrested about 80 members of Occupy Wall Street near the Union Square shopping district as the marchers swarmed onto oncoming traffic.

A police commander doused a handful of women with pepper spray in an incident captured on video and spread via the Internet, galvanizing the loosely organized protest movement.

The group has gained support among some union members. The United Federation of Teachers and the Transport Workers Union Local 100, which has 38,000 members, are among those pledging solidarity.

The unions could provide important organizational and financial support for the largely leaderless movement.