Facebook service has been restored

Facebook Announcement:
Currently, the service has been restored, and we are working hard to fully restore it to normal operation.
OUR SERVICES ARE NOW BACK ONLINE AND ACTIVELY WORKING TO FULLY RETURN THEM TO REGULAR OPERATIONS
We believe the root cause of this downtime was an incorrect configuration change.
"WE WANT TO MAKE CLEAR AT THIS TIME WE BELIEVE THE ROOT CAUSE OF THIS OUTAGE WAS A FAULTY CONFIGURATION CHANGE"
The underlying cause of the outage also impacted many internal tools and systems.
The underlying cause of the outage also impacted many of the internal tools and systems.
There is no evidence to suggest that user data was leaked as a result of the downtime.
There is also no evidence that user data was compromised as a result of this downtime.

Configuration changes on backbone routers that coordinate network traffic between data centers caused issues that interrupted communication.