Facebook Inc struggled to restore its services fully on Thursday after a 17-hour partial outage made the world's largest social network inaccessible to users across the globe, driving a wave of online complaints.
The number of reports on the crowd-sourced DownDetector website - one of the internet's most used sources of numbers on outages - peaked at just over 12 000, gradually falling to a couple of hundreds by early Thursday.
But with thousands of users complaining on Twitter under the hashtag #facebookdown, a number of media reports put the number affected in the millions.
The BBC and a handful of other media outlets said it was the platform's longest ever outage. Reuters was not immediately able to verify those claims.
Facebook representatives took to Twitter to update users on the problems.