Facebook users in parts of the world were unable to access some of the apps' functions on Wednesday (Jul 3).
According to the website Down Detector, users in Europe, the US, South America and Japan were particularly affected, with thousands of users across the globe running into problems.
In Asia, Singapore and Manila reported the most disruptions, according to CNA.
The problems come at the same time as a similar issue on WhatsApp, where files appear to be running into problems sending – meaning that photos, videos and voice messages won't show up properly.
And users also report that Instagram has stopped working, with photos also failing to load on that site.
Facebook says it is aware of the issues and “working to get things back to normal as quickly as possible.”
Last time all three of Facebook's major services broke, the outage lasted for many hours. It later blamed that problem on a server issue that had a knock-on effect on Instagram and WhatsApp, as well as Facebook, since the three use shared infrastructure.
"As a result of a server configuration change, many people had trouble accessing our apps and services," Facebook posted on Twitter after that previous outage was fixed. "We've now resolved the issues and our systems are recovering. We’re very sorry for the inconvenience and appreciate everyone’s patience."
When those problems happened in March, they were said to be perhaps the biggest outage in the history of the internet, hitting millions of people.