Facebook confirmed Monday what some users have been noticing for the past few days: Its site is having problems.
The issues have included disappearing content, difficulties logging on, being unable to view profiles, and error messages when posting content.
"We are working to resolve these issues as soon as possible," Facebook said in a brief message at its Help Center.
It didn't disclose the cause of the problems.
Last week Facebook said its membership had passed 300 million, and that the company became cash-flow positive during the last quarter, something it hadn't expected to achieve until next year.
As its user base continues to grow, Facebook faces "fun and important challenges" like making its site perform faster and more efficiently, CEO Mark Zuckerberg said in a blog post.