TikTok was aware that its design features are detrimental to its young users and that publicly touted tools aimed at limiting kids’ time on the site were largely ineffective, according to internal documents and communications exposed in lawsuit filed by the state of Kentucky.

Just days after multiple states sued TikTok for allegedly designing the app to addict children, new details have emerged about how they say the company does it. Jo Ling Kent reports.

In communications newly revealed, TikTok executives discuss being aware of the harms caused by their app. TikTok officials were warned of the app’s dangers to minors.