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.
Technology website The Verge reported that Instagram, Messenger and WhatsApp were also inaccessible to many users around the world.
Other news outlets have also reported on the outage.
Downdetector.com showed that there are more than 9000 incidents of people reporting issues with Facebook.
Downdetector.com's live outage map showed that the issues cropped up in Europe, the East Coast of the United States, and Southeast Asia including the Philippines.
Facebook had experienced one of its longest outages in March, when some users around the globe faced trouble accessing Facebook, Instagram and WhatsApp for over 24 hours.
- With a report from Reuters