By Cecilia Kang and David McCabe (excerpted) –

WASHINGTON — California’s attorney general on Wednesday said he was investigating Facebook’s privacy practices and accused the company of failing to cooperate with his inquiry, in the social network’s latest fight over how it treats user information.

In a lawsuit filed by the attorney general, Xavier Becerra, the state said that over an 18-month period, Facebook had resisted or ignored dozens of questions and requests for documents, including email correspondence between executives like Mark Zuckerberg and Sheryl Sandberg, the company’s top two leaders. Mr. Becerra filed the lawsuit in the California Superior Court to obtain the communications.

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