Nine anti-gay preachers who were arrested on Saturday, September 1 protesting New Orleans' 41st annual gay mardi gras Southern Decadence plan to sue the city.

The protesters carried signs which read “Homo Sex Is Sin” and “Homo Sex Is A Threat To National Security.”

Police arrested 8 men on suspicion of aggressive solicitation.

The ordinance under which they were arrested, approved in October, prohibits “any person or group of persons to loiter or congregate on Bourbon Street for the purpose of disseminating any social, political or religious message between the hours of sunset and sunrise.”

A ninth man, Justin Craft, 31, allegedly punched an officer when the officer attempted to confiscate his bullhorn. Craft was arrested on suspicion of battery, resisting an officer and interfering with a law enforcement investigation, reported.

The men claim the previously unenforced ordinance is unconstitutional, Religious News Service reported.

The ordinance's sponsor, City Councilwoman Kristin Gisleson Palmer, said the city had a legitimate interest in protecting the safety of people visiting Bourbon Street, a huge tourism draw for the city.

“This is really an issue of trying to protect public safety,” she said.