Facebook, along with Whatsapp and Instagram, has blamed a “faulty configuration change” for the widespread outage that impacted the social media platform.
The platforms had confirmed they were aware of issues and working to resolve them after thousands of people reported outages shortly before 5 pm UK time on Monday.
Users were eventually able to access Facebook and Instagram late Monday evening, while WhatsApp said its services were “back and running at 100%” as of 3.30 am on Tuesday.
Facebook said: “Our engineering teams have learned that configuration changes on the backbone routers that coordinate network traffic between our data centers caused issues that interrupted this communication. This disruption to network traffic had a cascading effect on the way our data centers communicate, bringing our services to a halt.”