San Francisco (CNN Business) Tensions continue to rise between Google and its employees.

Google GOOG The latest development occurred Monday whensent an email to all staff members describing its decision to fire four employees for allegedly violating its data-security policies. Google confirmed the contents of the email titled "Securing our data," which was first obtained and reported on by Bloomberg.

The email described some of the actions allegedly taken by the fired employees, including accessing other employees' calendars and sharing information about their whereabouts with outside sources. It was sent out on behalf of Google's Security and Investigations Team.

The company declined to comment beyond confirming the contents of the email.

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