BOSTON - An international protest movement sparked by a comment by a Toronto police officer about rape victims is expanding in the U.S.

Organizers of viral "slut walk" campaigns are planning marches in Seattle, Boston, Chicago, Philadelphia and elsewhere.

The rallies feature provocatively dressed women and men who march to bring attention to "slut-shaming" and the treatment of sexual assault victims.

In January, a Toronto police officer told York University students that women should avoid dressing like "sluts" to avoid being raped. He later apologized.

Slut walks have already been held in Toronto, Dallas, Asheville, N.C.

More than 2,000 people have responded on Facebook to participate in Boston's slut walk on Saturday.