US cybersecurity firm FireEye says it was hacked by foreign government

One of country's largest cybersecurity companies says sophisticated operation stole tools it uses to test government clients' defenses

FireEye, one of the largest cybersecurity companies in the US, said on Tuesday that foreign government hackers with world-class capabilities" broke into its network and stole tools it uses to test the defenses of its thousands of customers, who include federal, state and local governments and major global corporations.

The hackers primarily sought information related to certain government customers", said FireEye's CEO, Kevin Mandia, in a statement, without naming them. He said there was no indication the hackers got customer information from the company's consulting or incident-response businesses or threat intelligence data it collects.