This is the second year in a row violence has broken out during May Day in Seattle. Last year, anarchists broke windows of store fronts, including Niketown, and vehicles and used smoke bombs. Protesters also targeted a federal building, breaking windows and doors.
Olivia One Feather of Covington joined the crowd Wednesday night because she wanted to see how police handled the protest. She said she wasn't impressed, adding that she was pepper sprayed in the face while trying to video record officers.
Of the protesters, she said, "They're doing what we need to do to stand up to ourselves. These are our streets and we have the right to take them."
Many of the protesters are self-described anarchists. A local anarchist website said protesters would attempt to disrupt May Day.
After the clashes died down, local residents were seen cleaning up trash left by the protesters.
The violence marred a May Day that immigrant-rights activists hoped would put a focus back on immigration reform. Thousands of people marched about 2 1/2 miles from the Central District toward Seattle's downtown Jackson Federal Building after a May Day rally supporting immigrant rights and labor.
Many carried signs, with messages such as "We are America," and "There are no illegal humans." One sign suggested forgetting about marijuana and instead asking the United States to "Legalize my mom," a reference to Washington's recent legalization of marijuana.
Other demonstrations and rallies in Olympia, Mount Vernon, Spokane, Vancouver, Walla Walla, Wenatchee and Yakima went along peacefully.
Associated Press writers Rachel La Corte in Olympia, Wash., Shannon Dininny in Yakima, Wash. and Manuel Valdes in Seattle contributed to this story.