The Internet vigilante hacker group Anonymous claimed to have broken into an Apple Inc server and published a small number of usernames and passwords for one of the U.S. technology company's websites.

Anonymous said on Sunday via its account on microblogging site Twitter that Apple could be a target for hackers and released the data as part of its Anti Security, or "AntiSec," campaign.

"Not being so serious, but well ... Apple could be target, too. But don't worry, we are busy elsewhere," Anonymous said on its Twitter feed, where it shared a link to the data posted on text-sharing website Pastebin.

Anonymous said the data included 27 usernames and passwords for the www.abs.apple.com website.

The website, used by Apple for online surveys, on Monday displayed an error message that said the server was temporarily offline.

A spokesman for Apple declined to comment.