The Latest on reports that millions of Facebook users' data was used to target political ads.
The Federal Trade Commission is investigating Facebook's privacy practices following a week of privacy scandals including whether the company engaged in "unfair acts" that cause "substantial injury" to consumers.
Facebook's stock, which already took a big hit last week, plunged as a result.
Facebook said in a statement on Monday that the company remains "strongly committed" to protecting people's information and that it welcomes the opportunity to answer the FTC's questions.
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