AKIPRESS.COM - Facebook is suffering the most severe outage in its history, with key services rendered unusable for users globally for much of Wednesday, BBC reports.

The last time Facebook had a disruption of this magnitude was in 2008, when the site had 150m users - compared to around 2.3bn monthly users today.

Facebook's main product, its two messaging apps and image-sharing site Instagram were all affected.

The cause of the interruption has not yet been made public.