A mother who is one of a group of parents suing TikTok after the deaths of their children said she wants "accountability" from the social media firm.
Ellen Roome, from Gloucestershire, is in America for the first day of the hearing, filed by the Social Media Victims Law Centre. She said: "It's about time we held them to account and said 'what are you showing our children?'"
The lawsuit, filed in the Superior Court of the State of Delaware, claims her son Julian "Jools" Sweeney, Isaac Kenevan, Archie Battersbee, Noah Gibson, and Maia Walsh all died while attempting a "blackout challenge".
A TikTok spokesperson said: "We strictly prohibit content that promotes or encourages dangerous behaviour."
Ms Roome has been campaigning for legislation - called Jools' Law - that would allow parents to access the social media accounts of their children if they die.
