Facebook has been forced to disable a messaging feature after a Welsh student discovered a flaw which allowed him to read strangers' messages.
Aberystwyth University student, Jack Jenkins, found he could read other users' messages sent through the New Year's Midnight Delivery feature.
The new feature, set up on Facebook Stories, allows users to write messages to friends to be automatically sent after midnight.
Facebook promptly disabled the feature upon discovering the issue.
A spokesman for Facebook confirmed that the site is back up and running again, and that it had been taken offline for a time while they dealt with the issue.
Facebook Stories is a separate site from the main Facebook site, and does not affect messaging on Facebook itself.