Two gun advocates who run a charity called the Hawaii Defense Foundation are suing the city because they claim the Hono­lulu Police Department has censored, removed and banned their comments from HPD’s Facebook page.

The comments have been critical of HPD and HPD officials.

The plaintiffs are also suing Capt. Andrew Lum, who maintains the HPD Facebook page.

Christopher Baker and Derek Scammon filed their lawsuit in U.S. District Court on Tuesday. They are also asking the court for a restraining order and injunction.

Baker and Scammon claim HPD’s actions are an unlawful administration of its official Facebook page and a violation of their constitutional free speech and due process rights.

"The HPD cannot comment on details regarding the pending lawsuit," Lum said in a written statement.

He also said HPD posts guidelines for its Facebook page on the website.