http://www.newsweek.com/facebook-instagram-whatsapp-downtime-outage-cause-1635530

Facebook and its other services are back online following a mass outage on October 4 that lasted several hours.

According to Downdetector, a real-time website monitoring service, over 10.6 million problem reports for Facebook were recorded worldwide on October 4. Facebook-owned services Instagram and WhatsApp were also offline, making it one of the the largest outages the company has experienced.