Facebook’s social networking site, photo-sharing social network Instagram and messaging app WhatsApp were temporarily inaccessible to some users on Sunday.
Downdetector.com, a site that monitors site outages, shows Facebook had been down since 6:30 a.m. EST in much of the world, with thousands of reported outages concentrated in the northeastern US, Europe and the Philippines.
It appeared to be back up and running for most users by 9 a.m. EST.
Facebook experienced one of its longest outages in March when some users around the globe faced trouble accessing Facebook, Instagram, and WhatsApp for more than 24 hours.
The outage monitoring website also showed that at the peak on Sunday, there were more than 3,000 incidents of people reporting issues with WhatsApp and 7,000 with Instagram.
Downdetector.com's live outage map showed that the issues were mainly in Europe and Asia.
Users took to Twitter to complain about the outage, tweeting jokes and comments along with the #facebookdown, #whatsappdown and #instagramdown hashtags.
Facebook did not immediately respond to a request for comment.