Although they are among the most popular social media apps in the world, it appears that Facebook, Instagram, WhatsApp, and Facebook Messenger have all crashed this afternoon.
According to DownDetector, the problems began around 17:44 and are affecting users worldwide.
Soon after the first report, the hashtag #facebookdown trended on Twitter, with users all over the world reporting connectivity issues.
Facebook has yet to respond to the outage.
This is a developing story.