(BN) Facebook Targeted by ‘Sophisticated Attack’ Using Malware

(Bloomberg ) Facebook Inc., operator of the world's largest social network with more than a billion users, has been targeted by a "sophisticated attack" by hackers.

An investigation is ongoing and Facebook hasn't found any evidence that user data was compromised, the Menlo Park, California-based company said today on its website.

Malware was installed on laptops used by Facebook employees when they visited a mobile developer, Facebook said. The laptops were running anti-virus software at the time.

"We are working continuously and closely with our own internal engineering teams, with security teams at other companies, and with law enforcement authorities to learn everything we can about the attack, and how to prevent similar incidents in the future," Facebook said.