Washington - A company responsible for doing background checks on US government employees has been hacked, the US Department of Homeland Security (DHS) said Wednesday.
The department is "aware of a cyber security intrusion" at the private company, DHS spokesman Peter Boogaard said in a statement.
The FBI has launched an investigation and the government has formed a cyber response team to work with the company to identify the scope of the intrusion, Boogaard said.
Some DHS employees may have been affected, he said, adding that DHS has notified its entire workforce to advise them to monitor their financial accounts for suspicious activity.
Employees also are being advised to watch for unsolicited requests for personal and financial information.
DHS did not identify the company that was hacked.
The news comes on the heels of a report by an internet security company saying that Russian hackers have breached 420,000 websites and stolen more than 1 billion user names and passwords.
The company that said it discovered the hack, Hold Securities, described the thieves as a Russian cybergang.