A new drinking game has gone viral on Facebok called NekNominate.
The stunt, believed to have originated in Australia, involves posting a video of someone downing drinks in an extreme manner and then nominating others to do the same within 24 hours.
They use the #neknominate hashtag and tag their friend in the video.
So far, two people’s deaths have been linked to the drinking game.
Jonny Byrne, 19, and Ross Cummins, 22, both died after apparently taking part.
His brother Patrick took to Facebook to express his frustration over his death during the game and asked others not to take part in it.