Users logging on for a social network break a bit after 11am AEST freaked out when they faced an error message instead of selfies and invitations to play Candy Crush.
The site was down for about five minutes for some users, up to 10 minutes for others.
Messages posted online, apparently linked to hacking grouip Anonymous, have claimed responsibility for attacking the site, but this has not been verified.
If the outage was orchestrated by Anonymous, it’s possible it was an attack over Facebook’s involvement in the US National Security Administration data-mining scandal.
The social network revealed last week it had received between 9000 and 10,000 user-data requests from US government entities.
BuzzFeed recently put together a summary of the internet in 60 seconds, estimating that more than 208,000 photos were uploaded to Facebook and more than 1,875,000 posts were liked.
Meaning that in the past five minutes 1,041,500 photos have gone un-uploaded, and 9,375,000 posts went unliked.
Desperate Facebookers turned to Twitter to find out if the outage was affecting anyone else.