Facebook users have complained of being unable to access the site after it appeared to crash on Saturday.
Hundreds of people said they were experiencing problems logging onto the website or app, loading posts or sending messages, although others reported no problems.
According to UK site DownDetector, which collects reports of website crashes, the problems on Facebook began at around 2.15pm on Saturday.
At its peak there were more than 1,500 reports of people experiencing problems getting onto the website – including some having a “total blackout”.
Others reported difficulties using the Facebook Messenger app and Instagram, which also saw problems at around the same time.
A report by MSN.com