Hackers, making good on a threat, published contact information for 20,000 FBI employees Monday afternoon, just one day after posting similar data on almost 10,000 Department of Homeland Security employees.<br />Department spokesman Peter Carr told CNN it does not appear there was a breach of private personnel information, such as Social Security numbers.<br />"The department is looking into the unauthorized access of a system operated by one of its components containing employee contact information," said Carr.<br />The hackers taunted federal officials, tweeting, "When will the US government realize we won't stop until they cut relations with Israel."