(Bloomberg) -- Names and addresses were stolen from a database with information on 4.6 million clients of online brokerage Scottrade Financial Services in 2013 and 2014, the company said on its website.

The company was told of the breach by federal authorities investigating cyber crimes involving the theft of information at the securities company and other firms, according to the statement. Scottrade said it was notifying clients and beefing up network defenses.

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