Some Facebook users encountered a major glitch Monday. 。

Early in the morning, a technical problem prevented people from posting articles via the share buttons on a number of websites, including 。 The。Wall Street Journal 。, Bloomberg and Reuters.。

A Facebook spokesperson blamed the technical difficulties on an issue with a spam filter, ZDNet reported. That filter is designed to prevent the spread of malware on the social network, but it produced "Message Failed" dialog boxes for some people sharing legit content on Monday.。

SEE ALSO:Why we should worry about Facebook's Trending topics disaster。

Sharing links directly on Facebook -- as opposed to from an outside website -- still worked. 。

Tweet may have been deleted。

In its help guide, Facebook explains that a block can last "a few hours or a few days" and that a company "can't lift this block for any reason." However, by Monday afternoon the issue seemed to be resolved.。

Tweet may have been deleted。