"PSAC would like to apologize for the offence created by comments posted anonymously to its recently launched website," the Public Service Association of Canada said in a statement.
"The union has taken down the website in its entirety pending a review of its moderation capacity. The comments were contrary to PSAC policy and contravened values that Canadians hold dear."
The website, harper-says.ca, was part of the union's "Harper Hates Me" campaign, a protest against recent cuts to public services.
The website allowed Canadians to write their own captions to photos from the prime minister's Flickr account.
Some of the posts were racist and attacked the prime minister’s family members, CTV News reported. "The union has no desire to convey childish or hateful messages to the public, or its members," PSAC said in a statement.
The harperhatesme.ca website is still operational.Suggest a correction