Facebook users around the world have reported difficulties in getting on the site in what appears to be a rare outage of the service.
When attempting to load the site, a message seen by some users reads "Sorry, something went wrong".
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Specially-trained prison security teams have been sent to HMP Hewell near Redditch, after trouble broke out on one of the prison's wings.
Household names are among 40 women to sign open letter to BBC Director General saying he must "act now" to end pay discrimination.
"We've never actually spoken so publicly about her," the Duke of Cambridge said. "But we felt that this was the right time to do it."