Four nonprofit groups seeking to protect kids’ privacy online asked the Federal Trade Commission (FTC) to investigate YouTube today, after back-to-back reports allegedly showed that YouTube is still targeting personalized ads on videos “made for kids.”

Now it has become urgent that the FTC probe YouTube’s data and advertising practices, the groups’ letter said, and potentially intervene. Otherwise, it’s possible that YouTube could continue to allegedly harvest data on millions of kids, seemingly in violation of the Children’s Online Privacy Protection Act (COPPA) and the FTC Act.