It is early stages yet but expect a significant amount of press coverage about the attack over the weekend.
The big questions will be:
When did this happen?
When did Facebook find out?
How long after finding out did Facebook take to act?
How sophisticated was the attack?
If you have been affected, what can you do?
Has any personal data been compromised? If yes, it is likely to fall under the remit of GDPR which could mean record breaking fines for Facebook.
Up to 50m Facebook accounts attacked