More than 3,000 people may have had their payment card and contact information accessed by hackers who made their way into the systems of Dow Jones & Company.

"To date, our extensive review has not uncovered any direct evidence that information was stolen, and we have taken steps to stop the unauthorized access," Dow Jones CEO William Lewis wrote in a letter sent to customers on Oct. 9.

Lewis said the effort wasn't focused on the direct theft of financial information, but on acquiring information to trick customers into providing their information in the future. "It appears that the focus was to obtain contact information such as names, addresses, email addresses and phone numbers of current and former subscribers in order to send fraudulent solicitations," the letter warned.

It also reminded customers to be on the lookout for phishing scams, including "calls or emails from unknown sources" soliciting personal information.

Related Story: http://www.washingtonexaminer.com/article/2573293

The number affected by the hack is relatively small, though it indicates the vulnerability of top financial firms. JPMorgan lost information on 76 million customers in 2014. Scottrade lost information on 4.6 million customers this month. Aside from identity theft, phishing scams are the most common use for the stolen data.

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