A NY grand jury has subpoenaed records from two smartphone makers involved in the partnerships, anonymous sources described as familiar with the requests told the Times. Both companies entered into large and complex data deals with Facebook, allowing all the firms involved in the partnership to collect vast troves of information on millions of users.
"We are cooperating with investigators and take those probes seriously", a Facebook spokesman told the paper.
Earlier this year, reports suggested that Facebook could be hit with the biggest fine ever handed down by the U.S. Federal Trade Commission (FTC) after it was revealed that Cambridge Analytica had mined the information of up to 87 million users without their consent.
As if to underscore the company's challenges, Facebook's social network suffered one of the worst technical outages in its history on Wednesday, leaving users and advertisers unable to access the site for much of the day.
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At a bumpy street circuit where overtaking has been hard , F1 bosses will hope the introduction of new rules can inject spice. But Hamilton later told Sky Sports: "It might be closer than we think, it might be a bigger gap than we think".
Federal prosecutors are investigating data-sharing deals struck between Facebook and makers of mobile computing devices.
It wasn't immediately clear what the grand jury was focused on or when its investigation began. Apple, for example, was able to slurp up contact numbers and calendar entries from users who thought they'd disabled all sharing, unbeknownst to the users - though Apple maintains it had no idea Facebook had given it special access and that it removed no data from users' devices.
"This episode has clearly hurt us", Facebook CEO Zuckerberg told Congress past year while speaking about the Cambridge Analytica scandal. The investigation comes as Facebook continues to struggle with the fallout from the Cambridge Analytica data-sharing scandal.
The United States Department of Justice declined to comment on the report.