News Update of Facebook being hacked by the  Zastranienie collective 

we recently got wind that the recent Facebook outage was because it was being hacked by anonymous 

Whether that news is true or not remains to be seen but many features are unavailable. and many people are unable to log in at the moment.

full article here.
http://www.infotales.com/facebook-news-facebook-hacked-anonymous-zastranienie-collective