TikTok sued for 'viral blackout challenge deaths'

The parents of four British teenagers are suing the social media firm over the deaths of their children.
The lawsuit claims Isaac Kenevan, 13, Archie Battersbee, 12, Julian 'Jools' Sweeney, 14, and Maia Walsh, 13, died from doing the 'blackout challenge', popular on the video-sharing app.