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".
More top news
A rollercoaster has come off the rails at a theme park in Scotland, leaving nine children and two adults in hospital.
"I saw a lot of smoke come out from the tail-end of the aircraft. I wondered if it was normal, whether it was just exhaust fumes."
The House of Commons Petitions Committee has said they will keep an eye on the petition and are concerned about fraudulent signatures.