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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Two pilots have been arrested on suspicion of being under the influence of alcohol as they prepared to fly from Scotland to the New York.
Two teenagers have been arrested on suspicion of drugs offences following the death of a 17-year-old youth who collapsed at Leeds Festival.
Theresa May will gather Cabinet ministers together on Wednesday to discuss her plans for Brexit.