The Facebook shut down, which occurred early Thursday, has left millions of users without access to the social network. “We're working on getting it fixed as soon as we can,” a statement on the site said, NBCNews.com reports.

The temporary disconnection seems to be affecting users around the globe. Based on early reports, users in the United Kingdom, China, Singapore and India were most affected by the disruption.

Minutes into the shut down, the hashtag #WhenFacebookWasDown” was trending globally on rival social-networking site Twitter. Numerous tweets regarding the shut down were being shared, a good number of them comical.

In less then an hour, Facebook started to come back online for some users and the company apologized for the inconvenience in a statement.

"We experienced an issue that prevented people from posting to Facebook for a brief period of time," the company said. "We resolved the issue quickly, and we are now back to 100%."

According to NBCNews.com, a spokesperson for Facebook would not specify how many users were affected or elaborate on what caused the problem.

ABC News reported that that the shutdown also affected Facebook’s mobile app.

USA Today noted that Facebook does not suffer frequent outages, making the recent event unusual for the site. The newspaper noted that in 2010, the company took unusual steps of explaining an outage on a blog post from its engineering team. In that message posted two years ago, it said that the outage was caused by an “unfortunate handling of an error condition.”

The company claims almost 1.28 billion users across the world and counts more than 80% of its users outside the U.S. and Canada.

The social networking site is available in 70 languages and was founded by Mark Zuckerberg in Harvard 10 years ago with fellow Harvard University students Eduardo Saverin, Andrew McCollum, Dustin Moskovitz and Chris Hughes. In 2013, Facebook was valued at over $15 billion.