Popular social media platforms and video streaming services pose serious risks to user privacy, with children and teenagers most at risk, the Federal Trade Commission found in a report published Thursday.

The FTC just published results of a sweeping study of social media sites that has been going on for four years. The organization said that many social media sites and streaming services engage in “vast surveillance of consumers in order to monetize their personal information.

The consumer-protection agency said in a report that major social-media companies and video streaming services engaged in vast consumer surveillance while failing to provide adequate privacy controls or safeguards for children.

German media empire Axel Springer will be split in two under a deal between CEO Mathias Doepfner and private equity firm KKR, the company said on Thursday, securing the billionaire chief executive's control over news titles Bild and Politico.

KKR & Co. and German billionaire Mathias Döpfner agreed to split up media conglomerate Axel Springer, separating its fast-growing classifieds units from its news businesses.

Private equity firm KKR and German billionaire Mathias Döpfner have struck a deal to separate Axel Springer's classifieds business from its media properties, the firms announced Thursday morning. Why it matters: KKR will officially exit the media business it helped fund and expand over the past five years.