May Day Immigration Protest Turn Violent

Protesters react as a police flash-bang grenade goes off during a May Day march that began as an anti-capitalism protest and turned into demonstrators clashing with police Wednesday, May 1, 2013, in downtown Seattle. (AP)

Protesters, some with painted faces, react as a police flash-bang grenade goes off during a May Day march that began as an anti-capitalism protest and turned into demonstrators clashing with police Wednesday, May 1, 2013, in downtown Seattle. (AP)

Protesters are detained by police during a May Day march that began as an anti-capitalism protest and turned into demonstrators clashing with police, Wednesday, May 1, 2013, in downtown Seattle. (AP)

A woman points out a broken window to a Seattle Police officer along the route of a May Day march that began as an anti-capitalism protest and turned into demonstrators clashing with police Wednesday, May 1, 2013, in downtown Seattle.

Protesters react after police set up a flash-bang grenade and tear-gas bombs during a May Day march that began as an anti-capitalism protest and turned into demonstrators clashing with police lies on the ground next to police batons, Wednesday, May 1, 2013, in downtown Seattle. (AP)

A Seattle Police officer is tripped up by a string held by protesters as he runs at them with his baton during a May Day march that began as an anti-capitalism protest and turned into demonstrators clashing with police, Wednesday, May 1, 2013, in downtown Seattle. (AP)