Downdetector.co.uk reported over 4700 complaints that Facebook was down in the United Kingdom with the outage beginning at about 10am this morning. Text messaging service WhatsApp is also reportedly having issues.
Downdetector's live outage map showed that the issues had mainly cropped up in Europe. It was one of Facebook's worst outages as it lasted many hours, which the social media giant had acknowledged on Twitter.
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.
Facebook, Instagram and WhatsApp are experiencing issues worldwide Sunday morning.
Express Online will keep you updated as the story develops.