(Bloomberg) -- Yahoo! Inc. is preparing to disclose a “massive” data breach of its main service, Recode reported, just as Verizon Communications Inc. prepares to take over the ailing internet company’s core assets.

The break-in was “widespread and serious” and is expected to be disclosed this week, the tech news website said, citing several anonymous sources close to the situation as saying. Yahoo didn’t respond to phone and e-mailed requests for comment outside of normal business hours.

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