It appeared to be back up and running for most users by 9 a.m. EST. A Facebook spokesman declined to give a reason for the outage, but said the issue has since been resolved and the company apologized for any inconvenience.
#FacebookDown, #instagramdown and #whatsappdown were all trending on Twitter globally. Facebook acquired Instagram in 2012 and WhatsApp in 2014. There are more than 1.52 billion daily active Facebook users, according to the social media network's website.