New York City ? The Rev. Al Sharpton was arrested at the Brooklyn Bridge on Wednesday as he and hundreds of demonstrators blocked traffic to protest the acquittal of three detectives in the 50-bullet shooting of an unarmed black man on his wedding day.

Sharpton, two survivors of the shooting and the slain man’s fiancee were among about a dozen people arrested on disorderly conduct charges near the base of the bridge. Police led away demonstrators at several other bridges and tunnels in the city.

The protests were part of a coordinated campaign to urge federal authorities to investigate the November 2006 shooting of Sean Bell. Three officers were acquitted of state charges last month.