SEATTLE -- Posters that threaten the safety of Seattle Police have shown up ahead of Thursday's scheduled May Day protests and marches.
Mayor Ed Murray's office say the posters, discovered on Capitol Hill through the Central District, read, "The only good cop is a dead cop." In addition "Kill SPD" was spray painted on a bank on Capitol Hill, according to Seattle police.
Another poster found on Capitol Hill reads, "No new jail. No old jail. Fire to the prisons. (expletive) the police." The bottom of the poster listed the website for Puget Sound Anarchists.
The protests have turned violent the past couple of years, with anarchists and other groups infiltrating the scheduled peaceful marches. They have led to several arrests and vandalism of businesses.
Someone spray painted the words "Smash this" and "May Day" on windows at the Bario restaurant on Capitol Hill. In addition, an anarchist symbol was painted on a car dealership.
Related: May Day up-to-the-minute blog
On Thursday afternoon hundreds of people marched peacefully from South Seattle to Westlake Park downtown in support of workers and immigrant rights. Sponsored by El Comité, organizers of the permitted march said they are focused on promoting their message and not the possible violence and vandalism that may come from others.
"We don't focus on that because our march is peaceful. We have permits. We're out here trying to protect our community so, although there is frustration coming from other sides, we are respectful of what their message is. They're respectful of ours and we try to move forward together," said Diana Lopez of the May First Action Coalition.
Seattle Central College is shutting down the entire campus at 5:00 p.m. on Thursday, in light of last year's demonstrations and vandalism around the college.
“I’m really committed 100 percent to safety. You can enjoy it, you can look at it but don’t feed the animals. Don’t stick you hand to shake the paw,” said Seattle Central Community College President Paul T. Killpatrick.
There is word that two protests Thursday do not have permits and will be led by anti-capitalist groups.
Seattle City Councilman Bruce Harrell, who is the chair of the Public Safety Committee, says he hopes Seattle Police will do better a better job at communicating with demonstrators.
"What I hope they do better is announcing their presence, announcing their expectations. If you are a recipient of force from the department, you know it’s coming, you know you’re in an area you’re not supposed to be..we want to communicate to everyone around," Harrell said.
KING 5's Alison Morrow and Teresa Yuan contributed to this report.