New Mexico filed a lawsuit against Google, Twitter and several app developers for illegally collecting data from children under the age of 13 without parental consent.

New Mexico Attorney General Balderas said the companies are violating the 1998 Children’s Online Privacy Protection Act, a federal law, by collecting and selling the data on children.

The lawsuit, filed Wednesday, comes after a University of California, Berkeley study analyzed nearly 6,000 children’s apps and found that the majority of them appeared to violate COPPA.

“These apps can track where children live, play, and go to school with incredible precision,” Balderas said. “These multi-million-dollar tech companies partnering with app developers are taking advantage of New Mexican children, and the unacceptable risk of data breach and access from third parties who seek to exploit and harm our children will not be tolerated in New Mexico.”

In addition to Google and Twitter, the lawsuit accused Tiny Lab Productions, MoPub, AerServ, InMobi PTE, AppLovin and IronSource of collecting data on children.

Google spokesman Aaron Stein told The New York Times that it is the responsibility of app developers to disclose if their products are primarily for children, and that apps in the store’s family section “must comply with more stringent policies.”

Tiny Lab, based in Lithuania, denied its apps violate COPPA.

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