Meta will face a jury-selection hearing on August 12 in federal court in Oakland, California, in a lawsuit brought by California, Colorado, Kentucky and New Jersey that accuses its social media platforms of addictive design that harmed minors, according to Jiemian News. The states are seeking up to $1.4 trillion in damages.

The complaint says Meta knew Facebook and Instagram’s algorithms could harm teenagers but hid internal research from the public and regulators. It also alleges Meta failed to enforce age verification, allowed children under 13 to use the platforms without parental consent, and unlawfully collected minors’ personal data in violation of the Children’s Online Privacy Protection Act.

The filing says Meta chief executive Mark Zuckerberg is among the key witnesses the prosecution plans to call. Meta said the damages claim has no evidentiary support and called the calculation legally and factually baseless. Jiemian News also reported that Meta was ordered last week by a New Mexico state court to pay an additional $567 million and change teen-facing features on its platforms, after an earlier $375 million civil penalty in the same case, bringing the total above $900 million.