Racist mailers advertising the Ku Klux Klan at a festival in Niagara County were postmarked in Rochester, according to investigators.

Racist mailers advertising the Ku Klux Klan at a festival in Niagara County were postmarked in Rochester, according to investigators.

The fliers claim the KKK will be at the Niagara County Peach Festival in Lewiston on Saturday, stating, "Feel free to approach our members, who will be making their presence known, if you would like to join our White Pride Movement (sic)."

Lewiston police tell news partner, News10NBC's affiliate WGRZ, fewer than 20 people in town received the mailers at random. Fliers were also sent to Lockport and Tonawanda. All were post marked in Rochester.

The mailers fall under free speech, according to police. There has been strong reaction to the issue on social media. Some have threatened violence against the KKK. Police say they are investigating the comments.

"The problem that people are having is their reaction to this, then they have to be careful, and we've had some people who we are having to investigate now, which is unfortunate," said Lewiston Police Chief Frank Previte. "People who are reacting to this information because they're saying things that are crossing the line and people are sending us that information."