SEATTLE (AP) -- May Day demonstrators marched through downtown Seattle streets and rallied at Westlake Park Tuesday for a variety of causes.
The traditional international day honoring labor drew additional demonstrators for immigration rights and from the Occupy movement.
Seattle Mayor Mike McGinn had warned of possible traffic delays and disruptions. He said graffiti and posters indicated some people planned to use the demonstrations for property damage.
Police said they would remain flexible and work to prevent violence.
KING-TV reports one marcher has been arrested and a glass door along the route has been broken.