Down Detector, a website that tracks when online services suffering from outages, reported that Facebook began having issues at approximately 6:36 a.m. "Not good for those who do social media work, like me". Instagram outage issues have also hit parts of Asia.
Facebook, Instagram and WhatsApp users are naturally taking to Twitter to share their experiences.
Facebook Inc's social networking site is inaccessible to some users across the world on Sunday, according to Downdetector.com, a website which monitors outages. Denied access to these social media sites, thousands of people have taken to Twitter to complain about the outage.
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Another posted: "When you can't tell if WhatsApp is down because nobody is texting you".
At the time of writing, Facebook, WhatsApp and Instagram representatives are yet to acknowledge the outage on Twitter.
This story is developing...