Facebook has devised a "sympathise" button as an alternative to the "like" button for use in certain situations.
If a user selected a negative emotion from Facebook's list of feelings in a status update then the "like" button would change to "sympathise".
A Facebook engineer said at a company eventthat the button had been created as part of an internal project.
But he later went on to say there were no plans to launch it at the moment.
Facebook were holding a "compassion research day" where members of the public and researchers are invited along to "improve [Facebook's] understanding of the driving forces and benefits of compassion".